/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 -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 0.1.25-72570d3 [2020-08-22 16:33:40,938 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 16:33:40,942 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 16:33:40,988 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 16:33:40,989 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 16:33:40,999 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 16:33:41,003 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 16:33:41,007 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 16:33:41,010 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 16:33:41,013 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 16:33:41,014 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 16:33:41,015 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 16:33:41,016 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 16:33:41,019 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 16:33:41,022 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 16:33:41,024 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 16:33:41,025 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 16:33:41,026 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 16:33:41,028 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 16:33:41,036 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 16:33:41,039 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 16:33:41,040 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 16:33:41,041 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 16:33:41,042 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 16:33:41,055 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 16:33:41,078 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 [2020-08-22 16:33:41,123 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 16:33:41,123 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 16:33:41,125 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 16:33:41,125 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 16:33:41,125 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 16:33:41,125 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 16:33:41,125 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 16:33:41,126 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 16:33:41,127 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 16:33:41,127 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 16:33:41,128 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 16:33:41,128 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 16:33:41,128 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 16:33:41,129 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 16:33:41,129 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 16:33:41,129 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 16:33:41,129 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 16:33:41,130 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 16:33:41,130 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 16:33:41,130 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 16:33:41,131 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 16:33:41,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:33:41,131 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 16:33:41,131 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 16:33:41,131 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 16:33:41,131 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 16:33:41,132 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 16:33:41,132 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 16:33:41,132 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 16:33:41,132 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-22 16:33:41,515 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 16:33:41,540 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 16:33:41,544 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 16:33:41,546 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 16:33:41,546 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 16:33:41,547 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_5-1.c [2020-08-22 16:33:41,618 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cca385678/ae0823c4dfb9480596bfeb7f7eae4641/FLAG7b4417892 [2020-08-22 16:33:42,124 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 16:33:42,125 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_5-1.c [2020-08-22 16:33:42,133 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cca385678/ae0823c4dfb9480596bfeb7f7eae4641/FLAG7b4417892 [2020-08-22 16:33:42,445 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cca385678/ae0823c4dfb9480596bfeb7f7eae4641 [2020-08-22 16:33:42,457 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 16:33:42,459 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 16:33:42,461 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 16:33:42,461 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 16:33:42,467 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 16:33:42,468 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:33:42" (1/1) ... [2020-08-22 16:33:42,472 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ecdf502 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:33:42, skipping insertion in model container [2020-08-22 16:33:42,472 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:33:42" (1/1) ... [2020-08-22 16:33:42,481 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 16:33:42,502 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 16:33:42,753 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:33:42,760 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 16:33:42,782 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:33:42,800 INFO L208 MainTranslator]: Completed translation [2020-08-22 16:33:42,801 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:33:42 WrapperNode [2020-08-22 16:33:42,801 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 16:33:42,802 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 16:33:42,802 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 16:33:42,802 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 16:33:42,815 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:33:42" (1/1) ... [2020-08-22 16:33:42,815 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:33:42" (1/1) ... [2020-08-22 16:33:42,909 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:33:42" (1/1) ... [2020-08-22 16:33:42,910 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:33:42" (1/1) ... [2020-08-22 16:33:42,914 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:33:42" (1/1) ... [2020-08-22 16:33:42,917 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:33:42" (1/1) ... [2020-08-22 16:33:42,918 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:33:42" (1/1) ... [2020-08-22 16:33:42,920 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 16:33:42,921 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 16:33:42,921 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 16:33:42,921 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 16:33:42,922 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:33:42" (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 [2020-08-22 16:33:42,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 16:33:42,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 16:33:42,997 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-08-22 16:33:42,997 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-08-22 16:33:42,997 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 16:33:42,997 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 16:33:42,997 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 16:33:42,997 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-08-22 16:33:42,997 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-08-22 16:33:42,997 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 16:33:42,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 16:33:42,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 16:33:43,217 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 16:33:43,218 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 16:33:43,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:33:43 BoogieIcfgContainer [2020-08-22 16:33:43,224 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 16:33:43,225 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 16:33:43,225 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 16:33:43,229 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 16:33:43,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:33:42" (1/3) ... [2020-08-22 16:33:43,231 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44838fea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:33:43, skipping insertion in model container [2020-08-22 16:33:43,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:33:42" (2/3) ... [2020-08-22 16:33:43,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44838fea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:33:43, skipping insertion in model container [2020-08-22 16:33:43,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:33:43" (3/3) ... [2020-08-22 16:33:43,234 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_5-1.c [2020-08-22 16:33:43,248 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-08-22 16:33:43,257 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 16:33:43,276 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 16:33:43,312 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 16:33:43,313 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 16:33:43,313 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-08-22 16:33:43,313 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 16:33:43,315 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 16:33:43,315 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 16:33:43,315 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 16:33:43,316 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 16:33:43,361 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-08-22 16:33:43,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-22 16:33:43,379 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:33:43,380 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:33:43,381 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:33:43,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:33:43,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-08-22 16:33:43,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:33:43,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4593867] [2020-08-22 16:33:43,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:33:43,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:43,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:33:43,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:43,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:33:43,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:43,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:33:43,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4593867] [2020-08-22 16:33:43,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:33:43,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 16:33:43,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907133760] [2020-08-22 16:33:43,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 16:33:43,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:33:43,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 16:33:43,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 16:33:43,681 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-08-22 16:33:43,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:33:43,815 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-08-22 16:33:43,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 16:33:43,818 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-22 16:33:43,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:33:43,829 INFO L225 Difference]: With dead ends: 44 [2020-08-22 16:33:43,829 INFO L226 Difference]: Without dead ends: 30 [2020-08-22 16:33:43,833 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 [2020-08-22 16:33:43,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-22 16:33:43,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-22 16:33:43,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-22 16:33:43,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-08-22 16:33:43,886 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-08-22 16:33:43,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:33:43,887 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-08-22 16:33:43,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 16:33:43,887 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-08-22 16:33:43,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-22 16:33:43,889 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:33:43,889 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:33:43,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 16:33:43,890 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:33:43,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:33:43,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-08-22 16:33:43,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:33:43,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553997788] [2020-08-22 16:33:43,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:33:43,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:43,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:33:43,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:43,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:33:43,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:43,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:33:43,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553997788] [2020-08-22 16:33:43,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:33:43,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 16:33:43,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137555841] [2020-08-22 16:33:43,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 16:33:43,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:33:43,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 16:33:43,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 16:33:43,973 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-08-22 16:33:44,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:33:44,041 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-08-22 16:33:44,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 16:33:44,042 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-22 16:33:44,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:33:44,044 INFO L225 Difference]: With dead ends: 36 [2020-08-22 16:33:44,044 INFO L226 Difference]: Without dead ends: 32 [2020-08-22 16:33:44,046 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 [2020-08-22 16:33:44,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-22 16:33:44,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-22 16:33:44,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-22 16:33:44,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-08-22 16:33:44,057 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-08-22 16:33:44,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:33:44,058 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-08-22 16:33:44,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 16:33:44,058 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-08-22 16:33:44,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 16:33:44,063 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:33:44,063 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] [2020-08-22 16:33:44,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 16:33:44,064 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:33:44,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:33:44,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-08-22 16:33:44,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:33:44,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861227312] [2020-08-22 16:33:44,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:33:44,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:44,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:33:44,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:44,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:33:44,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:44,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 16:33:44,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:44,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 16:33:44,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:44,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 16:33:44,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861227312] [2020-08-22 16:33:44,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301505322] [2020-08-22 16:33:44,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-08-22 16:33:44,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:44,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2020-08-22 16:33:44,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:33:44,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 16:33:44,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:33:44,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-08-22 16:33:44,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106715063] [2020-08-22 16:33:44,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 16:33:44,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:33:44,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 16:33:44,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-08-22 16:33:44,468 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-08-22 16:33:44,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:33:44,707 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2020-08-22 16:33:44,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 16:33:44,707 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-08-22 16:33:44,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:33:44,709 INFO L225 Difference]: With dead ends: 58 [2020-08-22 16:33:44,709 INFO L226 Difference]: Without dead ends: 34 [2020-08-22 16:33:44,711 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 [2020-08-22 16:33:44,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-22 16:33:44,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-08-22 16:33:44,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-22 16:33:44,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-08-22 16:33:44,720 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2020-08-22 16:33:44,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:33:44,721 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-08-22 16:33:44,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 16:33:44,721 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-08-22 16:33:44,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 16:33:44,723 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:33:44,723 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] [2020-08-22 16:33:44,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-08-22 16:33:44,927 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:33:44,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:33:44,928 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-08-22 16:33:44,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:33:44,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121086087] [2020-08-22 16:33:44,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:33:44,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:44,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:33:44,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:44,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:33:44,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:45,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 16:33:45,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:45,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 16:33:45,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:45,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 16:33:45,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121086087] [2020-08-22 16:33:45,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913196628] [2020-08-22 16:33:45,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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) [2020-08-22 16:33:45,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:45,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:33:45,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:33:45,186 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 16:33:45,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:33:45,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-08-22 16:33:45,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974098055] [2020-08-22 16:33:45,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 16:33:45,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:33:45,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 16:33:45,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-22 16:33:45,189 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 9 states. [2020-08-22 16:33:45,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:33:45,367 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2020-08-22 16:33:45,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 16:33:45,367 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-08-22 16:33:45,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:33:45,371 INFO L225 Difference]: With dead ends: 54 [2020-08-22 16:33:45,371 INFO L226 Difference]: Without dead ends: 50 [2020-08-22 16:33:45,372 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 [2020-08-22 16:33:45,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-08-22 16:33:45,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-08-22 16:33:45,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-22 16:33:45,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2020-08-22 16:33:45,391 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 27 [2020-08-22 16:33:45,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:33:45,391 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2020-08-22 16:33:45,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 16:33:45,392 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2020-08-22 16:33:45,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-22 16:33:45,394 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:33:45,394 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] [2020-08-22 16:33:45,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:33:45,609 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:33:45,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:33:45,609 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-08-22 16:33:45,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:33:45,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879507075] [2020-08-22 16:33:45,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:33:45,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:45,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:33:45,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:45,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:33:45,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:45,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 16:33:45,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:45,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 16:33:45,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:45,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 16:33:45,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:45,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 16:33:45,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:45,799 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 16:33:45,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879507075] [2020-08-22 16:33:45,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503368812] [2020-08-22 16:33:45,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-08-22 16:33:45,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:45,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2020-08-22 16:33:45,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:33:45,930 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 16:33:45,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:33:45,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2020-08-22 16:33:45,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938663977] [2020-08-22 16:33:45,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 16:33:45,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:33:45,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 16:33:45,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-08-22 16:33:45,933 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand 11 states. [2020-08-22 16:33:46,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:33:46,271 INFO L93 Difference]: Finished difference Result 108 states and 170 transitions. [2020-08-22 16:33:46,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 16:33:46,272 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-08-22 16:33:46,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:33:46,274 INFO L225 Difference]: With dead ends: 108 [2020-08-22 16:33:46,275 INFO L226 Difference]: Without dead ends: 66 [2020-08-22 16:33:46,279 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 [2020-08-22 16:33:46,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-22 16:33:46,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-08-22 16:33:46,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-22 16:33:46,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 95 transitions. [2020-08-22 16:33:46,302 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 95 transitions. Word has length 39 [2020-08-22 16:33:46,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:33:46,303 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 95 transitions. [2020-08-22 16:33:46,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 16:33:46,304 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 95 transitions. [2020-08-22 16:33:46,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-22 16:33:46,306 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:33:46,306 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] [2020-08-22 16:33:46,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:33:46,522 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:33:46,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:33:46,523 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-08-22 16:33:46,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:33:46,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543924494] [2020-08-22 16:33:46,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:33:46,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:46,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:33:46,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:46,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:33:46,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:46,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 16:33:46,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:46,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 16:33:46,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:46,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 16:33:46,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:46,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 16:33:46,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:46,685 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 16:33:46,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543924494] [2020-08-22 16:33:46,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112547835] [2020-08-22 16:33:46,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-08-22 16:33:46,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:46,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2020-08-22 16:33:46,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:33:46,847 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 16:33:46,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:33:46,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2020-08-22 16:33:46,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108645832] [2020-08-22 16:33:46,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 16:33:46,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:33:46,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 16:33:46,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-08-22 16:33:46,850 INFO L87 Difference]: Start difference. First operand 66 states and 95 transitions. Second operand 13 states. [2020-08-22 16:33:47,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:33:47,323 INFO L93 Difference]: Finished difference Result 180 states and 324 transitions. [2020-08-22 16:33:47,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 16:33:47,324 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-08-22 16:33:47,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:33:47,327 INFO L225 Difference]: With dead ends: 180 [2020-08-22 16:33:47,328 INFO L226 Difference]: Without dead ends: 120 [2020-08-22 16:33:47,330 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 [2020-08-22 16:33:47,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-08-22 16:33:47,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 106. [2020-08-22 16:33:47,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-08-22 16:33:47,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 169 transitions. [2020-08-22 16:33:47,355 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 169 transitions. Word has length 40 [2020-08-22 16:33:47,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:33:47,356 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 169 transitions. [2020-08-22 16:33:47,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 16:33:47,356 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 169 transitions. [2020-08-22 16:33:47,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-22 16:33:47,361 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:33:47,361 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] [2020-08-22 16:33:47,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:33:47,575 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:33:47,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:33:47,576 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-08-22 16:33:47,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:33:47,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760979124] [2020-08-22 16:33:47,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:33:47,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:47,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:33:47,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:47,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:33:47,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:47,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 16:33:47,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:47,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 16:33:47,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:47,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 16:33:47,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:47,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 16:33:47,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:47,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 16:33:47,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:47,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 16:33:47,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:47,813 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-08-22 16:33:47,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760979124] [2020-08-22 16:33:47,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585433821] [2020-08-22 16:33:47,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-08-22 16:33:47,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:47,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2020-08-22 16:33:47,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:33:47,982 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-08-22 16:33:47,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:33:47,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2020-08-22 16:33:47,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032227644] [2020-08-22 16:33:47,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 16:33:47,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:33:47,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 16:33:47,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-08-22 16:33:47,985 INFO L87 Difference]: Start difference. First operand 106 states and 169 transitions. Second operand 14 states. [2020-08-22 16:33:48,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:33:48,586 INFO L93 Difference]: Finished difference Result 258 states and 498 transitions. [2020-08-22 16:33:48,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 16:33:48,588 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-08-22 16:33:48,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:33:48,594 INFO L225 Difference]: With dead ends: 258 [2020-08-22 16:33:48,595 INFO L226 Difference]: Without dead ends: 158 [2020-08-22 16:33:48,597 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 [2020-08-22 16:33:48,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-08-22 16:33:48,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 112. [2020-08-22 16:33:48,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-08-22 16:33:48,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 180 transitions. [2020-08-22 16:33:48,629 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 180 transitions. Word has length 54 [2020-08-22 16:33:48,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:33:48,629 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 180 transitions. [2020-08-22 16:33:48,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 16:33:48,630 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 180 transitions. [2020-08-22 16:33:48,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-08-22 16:33:48,636 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:33:48,636 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] [2020-08-22 16:33:48,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-08-22 16:33:48,850 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:33:48,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:33:48,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1504181040, now seen corresponding path program 1 times [2020-08-22 16:33:48,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:33:48,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449279497] [2020-08-22 16:33:48,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:33:48,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:48,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:33:48,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:48,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:33:48,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:48,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 16:33:48,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:48,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 16:33:49,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:49,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 16:33:49,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:49,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 16:33:49,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:49,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 16:33:49,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:49,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 16:33:49,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:49,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 16:33:49,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:49,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-22 16:33:49,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:49,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 16:33:49,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:49,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 16:33:49,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:49,135 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 39 proven. 38 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-08-22 16:33:49,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449279497] [2020-08-22 16:33:49,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209413506] [2020-08-22 16:33:49,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-08-22 16:33:49,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:49,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 8 conjunts are in the unsatisfiable core [2020-08-22 16:33:49,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:33:49,280 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 31 proven. 31 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-08-22 16:33:49,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:33:49,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2020-08-22 16:33:49,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463208727] [2020-08-22 16:33:49,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 16:33:49,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:33:49,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 16:33:49,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-08-22 16:33:49,283 INFO L87 Difference]: Start difference. First operand 112 states and 180 transitions. Second operand 14 states. [2020-08-22 16:33:49,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:33:49,849 INFO L93 Difference]: Finished difference Result 244 states and 474 transitions. [2020-08-22 16:33:49,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 16:33:49,850 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 82 [2020-08-22 16:33:49,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:33:49,856 INFO L225 Difference]: With dead ends: 244 [2020-08-22 16:33:49,856 INFO L226 Difference]: Without dead ends: 123 [2020-08-22 16:33:49,859 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 [2020-08-22 16:33:49,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-08-22 16:33:49,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 101. [2020-08-22 16:33:49,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-08-22 16:33:49,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 154 transitions. [2020-08-22 16:33:49,893 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 154 transitions. Word has length 82 [2020-08-22 16:33:49,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:33:49,894 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 154 transitions. [2020-08-22 16:33:49,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 16:33:49,894 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 154 transitions. [2020-08-22 16:33:49,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-08-22 16:33:49,898 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:33:49,898 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] [2020-08-22 16:33:50,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:33:50,112 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:33:50,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:33:50,113 INFO L82 PathProgramCache]: Analyzing trace with hash 2011292190, now seen corresponding path program 1 times [2020-08-22 16:33:50,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:33:50,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051929216] [2020-08-22 16:33:50,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:33:50,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:50,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:33:50,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:50,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:33:50,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:50,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 16:33:50,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:50,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 16:33:50,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:50,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 16:33:50,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:50,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 16:33:50,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:50,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 16:33:50,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:50,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 16:33:50,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:50,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 16:33:50,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:50,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 16:33:50,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:50,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 16:33:50,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:50,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-22 16:33:50,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:50,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 16:33:50,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:50,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 16:33:50,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:50,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 16:33:50,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:50,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 16:33:50,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:50,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 16:33:50,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:50,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 16:33:50,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:50,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 16:33:50,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:50,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 16:33:50,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:50,603 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 89 proven. 150 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2020-08-22 16:33:50,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051929216] [2020-08-22 16:33:50,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339165471] [2020-08-22 16:33:50,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-08-22 16:33:50,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:50,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 12 conjunts are in the unsatisfiable core [2020-08-22 16:33:50,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:33:50,902 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 131 proven. 51 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2020-08-22 16:33:50,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:33:50,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 18 [2020-08-22 16:33:50,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606969397] [2020-08-22 16:33:50,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 16:33:50,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:33:50,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 16:33:50,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2020-08-22 16:33:50,911 INFO L87 Difference]: Start difference. First operand 101 states and 154 transitions. Second operand 18 states. [2020-08-22 16:33:51,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:33:51,770 INFO L93 Difference]: Finished difference Result 238 states and 428 transitions. [2020-08-22 16:33:51,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-22 16:33:51,771 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 136 [2020-08-22 16:33:51,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:33:51,775 INFO L225 Difference]: With dead ends: 238 [2020-08-22 16:33:51,775 INFO L226 Difference]: Without dead ends: 135 [2020-08-22 16:33:51,777 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=215, Invalid=1191, Unknown=0, NotChecked=0, Total=1406 [2020-08-22 16:33:51,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-08-22 16:33:51,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 112. [2020-08-22 16:33:51,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-08-22 16:33:51,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 160 transitions. [2020-08-22 16:33:51,814 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 160 transitions. Word has length 136 [2020-08-22 16:33:51,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:33:51,818 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 160 transitions. [2020-08-22 16:33:51,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 16:33:51,819 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 160 transitions. [2020-08-22 16:33:51,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-08-22 16:33:51,826 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:33:51,826 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] [2020-08-22 16:33:52,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:33:52,042 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:33:52,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:33:52,042 INFO L82 PathProgramCache]: Analyzing trace with hash -46122593, now seen corresponding path program 2 times [2020-08-22 16:33:52,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:33:52,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736745723] [2020-08-22 16:33:52,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:33:52,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:52,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:33:52,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:52,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:33:52,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:52,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 16:33:52,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:52,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 16:33:52,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:52,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 16:33:52,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:52,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 16:33:52,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:52,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 16:33:52,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:52,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 16:33:52,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:52,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 16:33:52,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:52,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 16:33:52,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:52,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 16:33:52,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:52,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-22 16:33:52,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:52,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 16:33:52,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:52,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 16:33:52,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:52,455 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 59 proven. 50 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-08-22 16:33:52,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736745723] [2020-08-22 16:33:52,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319354093] [2020-08-22 16:33:52,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-08-22 16:33:52,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-08-22 16:33:52,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:33:52,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjunts are in the unsatisfiable core [2020-08-22 16:33:52,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:33:52,625 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 58 proven. 15 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-08-22 16:33:52,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:33:52,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 15 [2020-08-22 16:33:52,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149436024] [2020-08-22 16:33:52,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 16:33:52,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:33:52,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 16:33:52,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-08-22 16:33:52,628 INFO L87 Difference]: Start difference. First operand 112 states and 160 transitions. Second operand 15 states. [2020-08-22 16:33:53,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:33:53,142 INFO L93 Difference]: Finished difference Result 228 states and 340 transitions. [2020-08-22 16:33:53,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 16:33:53,143 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 95 [2020-08-22 16:33:53,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:33:53,146 INFO L225 Difference]: With dead ends: 228 [2020-08-22 16:33:53,146 INFO L226 Difference]: Without dead ends: 129 [2020-08-22 16:33:53,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2020-08-22 16:33:53,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-08-22 16:33:53,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 117. [2020-08-22 16:33:53,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-08-22 16:33:53,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 163 transitions. [2020-08-22 16:33:53,169 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 163 transitions. Word has length 95 [2020-08-22 16:33:53,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:33:53,170 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 163 transitions. [2020-08-22 16:33:53,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 16:33:53,170 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 163 transitions. [2020-08-22 16:33:53,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-22 16:33:53,173 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:33:53,174 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] [2020-08-22 16:33:53,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-08-22 16:33:53,389 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:33:53,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:33:53,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1540036056, now seen corresponding path program 3 times [2020-08-22 16:33:53,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:33:53,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876020897] [2020-08-22 16:33:53,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:33:53,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:53,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:33:53,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:53,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:33:53,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:53,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 16:33:53,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:53,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 16:33:53,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:53,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 16:33:53,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:53,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 16:33:53,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:53,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 16:33:53,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:53,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 16:33:53,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:53,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 16:33:53,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:53,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 16:33:53,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:53,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 16:33:53,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:53,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-22 16:33:53,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:53,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 16:33:53,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:53,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 16:33:53,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:53,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 16:33:53,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:53,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 16:33:53,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:54,013 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2020-08-22 16:33:54,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876020897] [2020-08-22 16:33:54,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407437627] [2020-08-22 16:33:54,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-08-22 16:33:54,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-08-22 16:33:54,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:33:54,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 63 conjunts are in the unsatisfiable core [2020-08-22 16:33:54,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:33:54,622 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2020-08-22 16:33:54,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:33:54,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 28 [2020-08-22 16:33:54,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025531212] [2020-08-22 16:33:54,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-22 16:33:54,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:33:54,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-22 16:33:54,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-08-22 16:33:54,629 INFO L87 Difference]: Start difference. First operand 117 states and 163 transitions. Second operand 28 states. [2020-08-22 16:33:54,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:33:54,991 INFO L93 Difference]: Finished difference Result 127 states and 175 transitions. [2020-08-22 16:33:54,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 16:33:54,991 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 109 [2020-08-22 16:33:54,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:33:54,996 INFO L225 Difference]: With dead ends: 127 [2020-08-22 16:33:54,997 INFO L226 Difference]: Without dead ends: 123 [2020-08-22 16:33:54,998 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 139 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-08-22 16:33:54,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-08-22 16:33:55,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 107. [2020-08-22 16:33:55,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-22 16:33:55,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 147 transitions. [2020-08-22 16:33:55,016 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 147 transitions. Word has length 109 [2020-08-22 16:33:55,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:33:55,017 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 147 transitions. [2020-08-22 16:33:55,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-22 16:33:55,017 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 147 transitions. [2020-08-22 16:33:55,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-08-22 16:33:55,021 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:33:55,022 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] [2020-08-22 16:33:55,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:33:55,237 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:33:55,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:33:55,238 INFO L82 PathProgramCache]: Analyzing trace with hash 648432456, now seen corresponding path program 1 times [2020-08-22 16:33:55,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:33:55,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189672829] [2020-08-22 16:33:55,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:33:55,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:55,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:33:55,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:55,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:33:55,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:55,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 16:33:55,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:55,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 16:33:55,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:55,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 16:33:55,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:55,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 16:33:55,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:55,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 16:33:55,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:55,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 16:33:55,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:55,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 16:33:55,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:55,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 16:33:55,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:55,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-22 16:33:55,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:55,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 16:33:55,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:55,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 16:33:55,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:55,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-22 16:33:55,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:55,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 16:33:55,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:55,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 16:33:55,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:55,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 16:33:55,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:55,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 16:33:55,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:55,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 16:33:55,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:55,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 16:33:55,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:55,598 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 58 proven. 143 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2020-08-22 16:33:55,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189672829] [2020-08-22 16:33:55,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270944041] [2020-08-22 16:33:55,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-08-22 16:33:55,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:33:55,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 14 conjunts are in the unsatisfiable core [2020-08-22 16:33:55,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:33:55,786 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 49 proven. 168 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-08-22 16:33:55,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:33:55,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2020-08-22 16:33:55,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823128336] [2020-08-22 16:33:55,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 16:33:55,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:33:55,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 16:33:55,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-08-22 16:33:55,789 INFO L87 Difference]: Start difference. First operand 107 states and 147 transitions. Second operand 16 states. [2020-08-22 16:33:56,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:33:56,167 INFO L93 Difference]: Finished difference Result 212 states and 310 transitions. [2020-08-22 16:33:56,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 16:33:56,167 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 137 [2020-08-22 16:33:56,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:33:56,168 INFO L225 Difference]: With dead ends: 212 [2020-08-22 16:33:56,168 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 16:33:56,170 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 [2020-08-22 16:33:56,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 16:33:56,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 16:33:56,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 16:33:56,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 16:33:56,171 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 137 [2020-08-22 16:33:56,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:33:56,171 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 16:33:56,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 16:33:56,172 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 16:33:56,172 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 16:33:56,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:33:56,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 16:33:57,371 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 17 [2020-08-22 16:33:57,806 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 26 [2020-08-22 16:33:57,811 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 16:33:57,811 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-22 16:33:57,812 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-22 16:33:57,812 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 16:33:57,812 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 16:33:57,812 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-22 16:33:57,812 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-08-22 16:33:57,813 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2020-08-22 16:33:57,813 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2020-08-22 16:33:57,813 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2020-08-22 16:33:57,813 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-08-22 16:33:57,813 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-08-22 16:33:57,814 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= main_~x~0 5) (<= 5 main_~x~0)) [2020-08-22 16:33:57,814 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-08-22 16:33:57,814 INFO L268 CegarLoopResult]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2020-08-22 16:33:57,814 INFO L271 CegarLoopResult]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2020-08-22 16:33:57,814 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (not (<= |fibo2_#in~n| 2))) [2020-08-22 16:33:57,814 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-08-22 16:33:57,815 INFO L264 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (or (and (<= |fibo2_#in~n| 3) (<= |fibo2_#t~ret2| 1) (<= 1 |fibo2_#t~ret2|)) (<= 5 |fibo2_#in~n|)) (not (<= |fibo2_#in~n| 2))) [2020-08-22 16:33:57,815 INFO L268 CegarLoopResult]: For program point L20(lines 20 24) no Hoare annotation was computed. [2020-08-22 16:33:57,815 INFO L268 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2020-08-22 16:33:57,815 INFO L268 CegarLoopResult]: For program point L18(lines 18 24) no Hoare annotation was computed. [2020-08-22 16:33:57,815 INFO L268 CegarLoopResult]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2020-08-22 16:33:57,815 INFO L268 CegarLoopResult]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2020-08-22 16:33:57,816 INFO L271 CegarLoopResult]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2020-08-22 16:33:57,816 INFO L264 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (<= 2 |fibo1_#in~n|) (= fibo1_~n |fibo1_#in~n|)) [2020-08-22 16:33:57,816 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-08-22 16:33:57,816 INFO L264 CegarLoopResult]: At program point L13-2(line 13) the Hoare annotation is: (and (<= 2 |fibo1_#in~n|) (or (and (<= |fibo1_#in~n| 3) (<= |fibo1_#t~ret0| 1) (<= 1 |fibo1_#t~ret0|)) (and (<= 3 |fibo1_#t~ret0|) (<= 5 fibo1_~n) (<= |fibo1_#t~ret0| 3)) (and (<= 4 |fibo1_#in~n|) (<= |fibo1_#in~n| 4)) (<= 6 |fibo1_#in~n|)) (= fibo1_~n |fibo1_#in~n|)) [2020-08-22 16:33:57,816 INFO L268 CegarLoopResult]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2020-08-22 16:33:57,817 INFO L268 CegarLoopResult]: For program point L10(lines 10 14) no Hoare annotation was computed. [2020-08-22 16:33:57,817 INFO L268 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2020-08-22 16:33:57,817 INFO L268 CegarLoopResult]: For program point L8(lines 8 14) no Hoare annotation was computed. [2020-08-22 16:33:57,817 INFO L268 CegarLoopResult]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2020-08-22 16:33:57,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 04:33:57 BoogieIcfgContainer [2020-08-22 16:33:57,824 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 16:33:57,826 INFO L168 Benchmark]: Toolchain (without parser) took 15367.55 ms. Allocated memory was 140.5 MB in the beginning and 370.7 MB in the end (delta: 230.2 MB). Free memory was 103.8 MB in the beginning and 104.0 MB in the end (delta: -151.1 kB). Peak memory consumption was 230.0 MB. Max. memory is 7.1 GB. [2020-08-22 16:33:57,827 INFO L168 Benchmark]: CDTParser took 0.58 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.6 MB in the end (delta: 419.4 kB). Peak memory consumption was 419.4 kB. Max. memory is 7.1 GB. [2020-08-22 16:33:57,828 INFO L168 Benchmark]: CACSL2BoogieTranslator took 340.59 ms. Allocated memory is still 140.5 MB. Free memory was 103.4 MB in the beginning and 93.7 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-08-22 16:33:57,828 INFO L168 Benchmark]: Boogie Preprocessor took 118.11 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 93.7 MB in the beginning and 181.6 MB in the end (delta: -87.8 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-08-22 16:33:57,829 INFO L168 Benchmark]: RCFGBuilder took 303.21 ms. Allocated memory is still 203.4 MB. Free memory was 181.6 MB in the beginning and 168.3 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. [2020-08-22 16:33:57,830 INFO L168 Benchmark]: TraceAbstraction took 14599.06 ms. Allocated memory was 203.4 MB in the beginning and 370.7 MB in the end (delta: 167.2 MB). Free memory was 167.4 MB in the beginning and 104.0 MB in the end (delta: 63.4 MB). Peak memory consumption was 230.6 MB. Max. memory is 7.1 GB. [2020-08-22 16:33:57,834 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.58 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.6 MB in the end (delta: 419.4 kB). Peak memory consumption was 419.4 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 340.59 ms. Allocated memory is still 140.5 MB. Free memory was 103.4 MB in the beginning and 93.7 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 118.11 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 93.7 MB in the beginning and 181.6 MB in the end (delta: -87.8 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 303.21 ms. Allocated memory is still 203.4 MB. Free memory was 181.6 MB in the beginning and 168.3 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 14599.06 ms. Allocated memory was 203.4 MB in the beginning and 370.7 MB in the end (delta: 167.2 MB). Free memory was 167.4 MB in the beginning and 104.0 MB in the end (delta: 63.4 MB). Peak memory consumption was 230.6 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: 13.0s, OverallIterations: 12, TraceHistogramMax: 12, AutomataDifference: 4.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 389 SDtfs, 463 SDslu, 3006 SDs, 0 SdLazy, 3075 SolverSat, 455 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1190 GetRequests, 966 SyntacticMatches, 8 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 3.2s 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, 88 HoareAnnotationTreeSize, 449 FomulaSimplifications, 3023 FormulaSimplificationTreeSizeReduction, 0.6s HoareSimplificationTime, 11 FomulaSimplificationsInter, 3484 FormulaSimplificationTreeSizeReductionInter, 0.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 4.6s InterpolantComputationTime, 1517 NumberOfCodeBlocks, 1517 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 1495 ConstructedInterpolants, 0 QuantifiedInterpolants, 296013 SizeOfPredicates, 41 NumberOfNonLiveVariables, 1665 ConjunctsInSsa, 143 ConjunctsInUnsatCore, 22 InterpolantComputations, 2 PerfectInterpolantSequences, 2288/3178 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...