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/eca-rers2012/Problem14_label24.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 22:01:32,804 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 22:01:32,806 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 22:01:32,822 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 22:01:32,822 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 22:01:32,825 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 22:01:32,826 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 22:01:32,835 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 22:01:32,837 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 22:01:32,838 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 22:01:32,839 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 22:01:32,840 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 22:01:32,840 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 22:01:32,841 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 22:01:32,842 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 22:01:32,843 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 22:01:32,844 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 22:01:32,845 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 22:01:32,847 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 22:01:32,850 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 22:01:32,854 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 22:01:32,855 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 22:01:32,857 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 22:01:32,858 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 22:01:32,860 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 22:01:32,868 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 22:01:32,869 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 22:01:32,870 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 22:01:32,871 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 22:01:32,874 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 22:01:32,875 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 22:01:32,875 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 22:01:32,875 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 22:01:32,876 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 22:01:32,878 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 22:01:32,881 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 22:01:32,881 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 [2019-10-14 22:01:32,903 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 22:01:32,903 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 22:01:32,907 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 22:01:32,907 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 22:01:32,908 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 22:01:32,908 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 22:01:32,908 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 22:01:32,908 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 22:01:32,908 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 22:01:32,909 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 22:01:32,910 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 22:01:32,910 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 22:01:32,910 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 22:01:32,910 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 22:01:32,911 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 22:01:32,911 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 22:01:32,911 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 22:01:32,911 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 22:01:32,911 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 22:01:32,912 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 22:01:32,912 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 22:01:32,912 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:01:32,912 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 22:01:32,912 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 22:01:32,913 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 22:01:32,913 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 22:01:32,913 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 22:01:32,913 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 22:01:32,913 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 22:01:33,227 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 22:01:33,242 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 22:01:33,246 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 22:01:33,247 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 22:01:33,247 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 22:01:33,248 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label24.c [2019-10-14 22:01:33,321 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/037f5c424/bacf8f81006440cd83a71802423aefd4/FLAGae80bb2e7 [2019-10-14 22:01:33,923 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 22:01:33,924 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label24.c [2019-10-14 22:01:33,940 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/037f5c424/bacf8f81006440cd83a71802423aefd4/FLAGae80bb2e7 [2019-10-14 22:01:34,197 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/037f5c424/bacf8f81006440cd83a71802423aefd4 [2019-10-14 22:01:34,210 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 22:01:34,212 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 22:01:34,213 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 22:01:34,214 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 22:01:34,217 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 22:01:34,218 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:01:34" (1/1) ... [2019-10-14 22:01:34,223 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@124af0ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:34, skipping insertion in model container [2019-10-14 22:01:34,223 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:01:34" (1/1) ... [2019-10-14 22:01:34,232 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 22:01:34,305 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 22:01:34,885 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:01:34,892 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 22:01:35,015 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:01:35,043 INFO L192 MainTranslator]: Completed translation [2019-10-14 22:01:35,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:35 WrapperNode [2019-10-14 22:01:35,043 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 22:01:35,044 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 22:01:35,044 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 22:01:35,044 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 22:01:35,056 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:35" (1/1) ... [2019-10-14 22:01:35,056 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:35" (1/1) ... [2019-10-14 22:01:35,078 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:35" (1/1) ... [2019-10-14 22:01:35,078 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:35" (1/1) ... [2019-10-14 22:01:35,129 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:35" (1/1) ... [2019-10-14 22:01:35,163 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:35" (1/1) ... [2019-10-14 22:01:35,177 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:35" (1/1) ... [2019-10-14 22:01:35,207 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 22:01:35,213 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 22:01:35,213 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 22:01:35,213 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 22:01:35,214 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:35" (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 [2019-10-14 22:01:35,280 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 22:01:35,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 22:01:35,281 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 22:01:35,281 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 22:01:35,281 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 22:01:35,282 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 22:01:35,282 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 22:01:35,283 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 22:01:35,283 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 22:01:35,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 22:01:35,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 22:01:36,772 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 22:01:36,773 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 22:01:36,775 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:01:36 BoogieIcfgContainer [2019-10-14 22:01:36,775 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 22:01:36,776 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 22:01:36,776 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 22:01:36,779 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 22:01:36,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 10:01:34" (1/3) ... [2019-10-14 22:01:36,781 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39fa8875 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:01:36, skipping insertion in model container [2019-10-14 22:01:36,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:35" (2/3) ... [2019-10-14 22:01:36,781 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39fa8875 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:01:36, skipping insertion in model container [2019-10-14 22:01:36,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:01:36" (3/3) ... [2019-10-14 22:01:36,784 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label24.c [2019-10-14 22:01:36,794 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 22:01:36,803 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 22:01:36,816 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 22:01:36,847 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 22:01:36,847 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 22:01:36,848 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 22:01:36,848 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 22:01:36,848 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 22:01:36,848 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 22:01:36,849 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 22:01:36,849 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 22:01:36,877 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-14 22:01:36,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-14 22:01:36,886 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:36,888 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:01:36,890 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:36,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:36,897 INFO L82 PathProgramCache]: Analyzing trace with hash 2116109586, now seen corresponding path program 1 times [2019-10-14 22:01:36,908 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:36,908 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286990788] [2019-10-14 22:01:36,909 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:36,909 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:36,909 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:37,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:37,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:37,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:01:37,334 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286990788] [2019-10-14 22:01:37,335 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:01:37,335 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 22:01:37,336 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099421438] [2019-10-14 22:01:37,341 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:01:37,341 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:37,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:01:37,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 22:01:37,358 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2019-10-14 22:01:40,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:01:40,092 INFO L93 Difference]: Finished difference Result 886 states and 1613 transitions. [2019-10-14 22:01:40,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:01:40,098 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2019-10-14 22:01:40,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:01:40,118 INFO L225 Difference]: With dead ends: 886 [2019-10-14 22:01:40,118 INFO L226 Difference]: Without dead ends: 564 [2019-10-14 22:01:40,128 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:01:40,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2019-10-14 22:01:40,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 558. [2019-10-14 22:01:40,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2019-10-14 22:01:40,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 906 transitions. [2019-10-14 22:01:40,217 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 906 transitions. Word has length 47 [2019-10-14 22:01:40,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:01:40,218 INFO L462 AbstractCegarLoop]: Abstraction has 558 states and 906 transitions. [2019-10-14 22:01:40,218 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:01:40,218 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 906 transitions. [2019-10-14 22:01:40,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-14 22:01:40,225 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:40,225 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:01:40,225 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:40,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:40,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1939521290, now seen corresponding path program 1 times [2019-10-14 22:01:40,226 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:40,226 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786032561] [2019-10-14 22:01:40,227 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:40,227 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:40,227 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:40,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:40,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:40,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:40,523 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:01:40,524 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786032561] [2019-10-14 22:01:40,524 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:01:40,525 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 22:01:40,525 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85842756] [2019-10-14 22:01:40,527 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 22:01:40,528 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:40,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 22:01:40,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 22:01:40,529 INFO L87 Difference]: Start difference. First operand 558 states and 906 transitions. Second operand 9 states. [2019-10-14 22:01:42,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:01:42,682 INFO L93 Difference]: Finished difference Result 1320 states and 2174 transitions. [2019-10-14 22:01:42,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 22:01:42,683 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 121 [2019-10-14 22:01:42,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:01:42,692 INFO L225 Difference]: With dead ends: 1320 [2019-10-14 22:01:42,692 INFO L226 Difference]: Without dead ends: 768 [2019-10-14 22:01:42,695 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-14 22:01:42,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2019-10-14 22:01:42,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 566. [2019-10-14 22:01:42,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 566 states. [2019-10-14 22:01:42,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 819 transitions. [2019-10-14 22:01:42,731 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 819 transitions. Word has length 121 [2019-10-14 22:01:42,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:01:42,732 INFO L462 AbstractCegarLoop]: Abstraction has 566 states and 819 transitions. [2019-10-14 22:01:42,732 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 22:01:42,732 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 819 transitions. [2019-10-14 22:01:42,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-14 22:01:42,737 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:42,737 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:01:42,738 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:42,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:42,738 INFO L82 PathProgramCache]: Analyzing trace with hash -2114473467, now seen corresponding path program 1 times [2019-10-14 22:01:42,738 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:42,739 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147270022] [2019-10-14 22:01:42,739 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:42,739 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:42,739 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:42,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:42,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:42,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:42,959 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 39 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:01:42,960 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147270022] [2019-10-14 22:01:42,960 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281304509] [2019-10-14 22:01:42,960 INFO L94 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 [2019-10-14 22:01:43,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:43,039 INFO L256 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:01:43,052 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:01:43,126 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:01:43,127 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:01:43,127 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 22:01:43,127 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710165463] [2019-10-14 22:01:43,128 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:01:43,128 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:43,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:01:43,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:01:43,132 INFO L87 Difference]: Start difference. First operand 566 states and 819 transitions. Second operand 3 states. [2019-10-14 22:01:44,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:01:44,133 INFO L93 Difference]: Finished difference Result 1676 states and 2459 transitions. [2019-10-14 22:01:44,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:01:44,140 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 130 [2019-10-14 22:01:44,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:01:44,147 INFO L225 Difference]: With dead ends: 1676 [2019-10-14 22:01:44,148 INFO L226 Difference]: Without dead ends: 1116 [2019-10-14 22:01:44,150 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:01:44,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2019-10-14 22:01:44,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 932. [2019-10-14 22:01:44,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 932 states. [2019-10-14 22:01:44,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1275 transitions. [2019-10-14 22:01:44,186 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1275 transitions. Word has length 130 [2019-10-14 22:01:44,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:01:44,187 INFO L462 AbstractCegarLoop]: Abstraction has 932 states and 1275 transitions. [2019-10-14 22:01:44,187 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:01:44,187 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1275 transitions. [2019-10-14 22:01:44,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2019-10-14 22:01:44,195 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:44,196 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:01:44,400 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:01:44,401 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:44,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:44,402 INFO L82 PathProgramCache]: Analyzing trace with hash 511372486, now seen corresponding path program 1 times [2019-10-14 22:01:44,402 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:44,403 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437530825] [2019-10-14 22:01:44,403 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:44,403 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:44,403 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:44,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:44,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:44,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:44,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:45,292 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 109 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 22:01:45,292 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437530825] [2019-10-14 22:01:45,293 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488952658] [2019-10-14 22:01:45,293 INFO L94 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) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:01:45,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:45,384 INFO L256 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 22:01:45,392 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:01:45,451 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:01:45,604 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-10-14 22:01:45,605 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:01:45,605 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [15] total 18 [2019-10-14 22:01:45,605 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201041597] [2019-10-14 22:01:45,606 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:01:45,606 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:45,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:01:45,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2019-10-14 22:01:45,607 INFO L87 Difference]: Start difference. First operand 932 states and 1275 transitions. Second operand 5 states. [2019-10-14 22:01:47,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:01:47,047 INFO L93 Difference]: Finished difference Result 2268 states and 3089 transitions. [2019-10-14 22:01:47,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 22:01:47,047 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 233 [2019-10-14 22:01:47,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:01:47,059 INFO L225 Difference]: With dead ends: 2268 [2019-10-14 22:01:47,059 INFO L226 Difference]: Without dead ends: 1342 [2019-10-14 22:01:47,063 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 238 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2019-10-14 22:01:47,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2019-10-14 22:01:47,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 1318. [2019-10-14 22:01:47,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1318 states. [2019-10-14 22:01:47,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 1692 transitions. [2019-10-14 22:01:47,127 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 1692 transitions. Word has length 233 [2019-10-14 22:01:47,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:01:47,130 INFO L462 AbstractCegarLoop]: Abstraction has 1318 states and 1692 transitions. [2019-10-14 22:01:47,130 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:01:47,131 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 1692 transitions. [2019-10-14 22:01:47,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2019-10-14 22:01:47,141 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:47,142 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:01:47,355 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:01:47,356 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:47,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:47,356 INFO L82 PathProgramCache]: Analyzing trace with hash -266552290, now seen corresponding path program 1 times [2019-10-14 22:01:47,357 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:47,358 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538558436] [2019-10-14 22:01:47,358 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:47,358 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:47,358 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:47,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:47,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:47,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:47,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:48,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:48,553 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 130 proven. 215 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 22:01:48,554 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538558436] [2019-10-14 22:01:48,554 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149484775] [2019-10-14 22:01:48,554 INFO L94 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 [2019-10-14 22:01:48,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:48,660 INFO L256 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-14 22:01:48,668 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:01:48,755 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-14 22:01:48,948 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 258 proven. 53 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-10-14 22:01:48,948 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:01:48,949 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2019-10-14 22:01:48,949 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580870121] [2019-10-14 22:01:48,950 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 22:01:48,950 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:48,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 22:01:48,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-10-14 22:01:48,951 INFO L87 Difference]: Start difference. First operand 1318 states and 1692 transitions. Second operand 16 states. [2019-10-14 22:01:49,974 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2019-10-14 22:01:53,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:01:53,704 INFO L93 Difference]: Finished difference Result 3144 states and 4067 transitions. [2019-10-14 22:01:53,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-14 22:01:53,709 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 317 [2019-10-14 22:01:53,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:01:53,717 INFO L225 Difference]: With dead ends: 3144 [2019-10-14 22:01:53,718 INFO L226 Difference]: Without dead ends: 1785 [2019-10-14 22:01:53,722 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=254, Invalid=868, Unknown=0, NotChecked=0, Total=1122 [2019-10-14 22:01:53,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1785 states. [2019-10-14 22:01:53,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1785 to 1694. [2019-10-14 22:01:53,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1694 states. [2019-10-14 22:01:53,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1694 states to 1694 states and 1967 transitions. [2019-10-14 22:01:53,776 INFO L78 Accepts]: Start accepts. Automaton has 1694 states and 1967 transitions. Word has length 317 [2019-10-14 22:01:53,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:01:53,777 INFO L462 AbstractCegarLoop]: Abstraction has 1694 states and 1967 transitions. [2019-10-14 22:01:53,777 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 22:01:53,777 INFO L276 IsEmpty]: Start isEmpty. Operand 1694 states and 1967 transitions. [2019-10-14 22:01:53,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2019-10-14 22:01:53,784 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:53,784 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:01:53,987 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:01:53,988 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:53,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:53,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1074149043, now seen corresponding path program 1 times [2019-10-14 22:01:53,989 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:53,990 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313023750] [2019-10-14 22:01:53,990 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:53,991 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:53,991 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:54,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:54,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:54,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:54,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:54,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:54,768 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 187 proven. 120 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-14 22:01:54,768 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313023750] [2019-10-14 22:01:54,769 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208316251] [2019-10-14 22:01:54,769 INFO L94 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 [2019-10-14 22:01:55,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:55,010 INFO L256 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 22:01:55,020 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:01:55,075 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-14 22:01:55,188 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 221 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2019-10-14 22:01:55,189 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:01:55,189 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2019-10-14 22:01:55,189 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604341669] [2019-10-14 22:01:55,190 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:01:55,190 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:55,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:01:55,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2019-10-14 22:01:55,191 INFO L87 Difference]: Start difference. First operand 1694 states and 1967 transitions. Second operand 5 states. [2019-10-14 22:01:56,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:01:56,365 INFO L93 Difference]: Finished difference Result 4154 states and 4953 transitions. [2019-10-14 22:01:56,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 22:01:56,366 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 342 [2019-10-14 22:01:56,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:01:56,379 INFO L225 Difference]: With dead ends: 4154 [2019-10-14 22:01:56,379 INFO L226 Difference]: Without dead ends: 2466 [2019-10-14 22:01:56,385 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 349 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2019-10-14 22:01:56,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2466 states. [2019-10-14 22:01:56,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2466 to 2464. [2019-10-14 22:01:56,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2464 states. [2019-10-14 22:01:56,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2464 states to 2464 states and 2910 transitions. [2019-10-14 22:01:56,462 INFO L78 Accepts]: Start accepts. Automaton has 2464 states and 2910 transitions. Word has length 342 [2019-10-14 22:01:56,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:01:56,463 INFO L462 AbstractCegarLoop]: Abstraction has 2464 states and 2910 transitions. [2019-10-14 22:01:56,463 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:01:56,463 INFO L276 IsEmpty]: Start isEmpty. Operand 2464 states and 2910 transitions. [2019-10-14 22:01:56,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2019-10-14 22:01:56,473 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:56,474 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:01:56,677 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:01:56,678 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:56,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:56,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1203933665, now seen corresponding path program 1 times [2019-10-14 22:01:56,679 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:56,680 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668930] [2019-10-14 22:01:56,680 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:56,680 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:56,681 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:56,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:56,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:56,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:56,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:56,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:57,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:57,472 INFO L134 CoverageAnalysis]: Checked inductivity of 710 backedges. 386 proven. 73 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2019-10-14 22:01:57,474 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668930] [2019-10-14 22:01:57,475 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119127647] [2019-10-14 22:01:57,475 INFO L94 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 [2019-10-14 22:01:57,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:57,645 INFO L256 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 22:01:57,654 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:01:57,799 INFO L134 CoverageAnalysis]: Checked inductivity of 710 backedges. 561 proven. 2 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-10-14 22:01:57,799 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:01:57,800 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 9 [2019-10-14 22:01:57,800 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723796640] [2019-10-14 22:01:57,801 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 22:01:57,801 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:57,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 22:01:57,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-14 22:01:57,802 INFO L87 Difference]: Start difference. First operand 2464 states and 2910 transitions. Second operand 9 states. [2019-10-14 22:01:59,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:01:59,765 INFO L93 Difference]: Finished difference Result 5122 states and 6138 transitions. [2019-10-14 22:01:59,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 22:01:59,766 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 452 [2019-10-14 22:01:59,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:01:59,778 INFO L225 Difference]: With dead ends: 5122 [2019-10-14 22:01:59,778 INFO L226 Difference]: Without dead ends: 2846 [2019-10-14 22:01:59,783 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 465 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2019-10-14 22:01:59,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2846 states. [2019-10-14 22:01:59,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2846 to 2650. [2019-10-14 22:01:59,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2650 states. [2019-10-14 22:01:59,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2650 states to 2650 states and 3066 transitions. [2019-10-14 22:01:59,849 INFO L78 Accepts]: Start accepts. Automaton has 2650 states and 3066 transitions. Word has length 452 [2019-10-14 22:01:59,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:01:59,849 INFO L462 AbstractCegarLoop]: Abstraction has 2650 states and 3066 transitions. [2019-10-14 22:01:59,849 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 22:01:59,850 INFO L276 IsEmpty]: Start isEmpty. Operand 2650 states and 3066 transitions. [2019-10-14 22:01:59,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 537 [2019-10-14 22:01:59,863 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:59,864 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:00,067 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:00,067 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:00,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:00,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1066963527, now seen corresponding path program 1 times [2019-10-14 22:02:00,068 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:00,068 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869637772] [2019-10-14 22:02:00,068 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:00,068 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:00,069 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:00,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:00,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:00,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:00,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:00,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:00,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:00,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:01,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 518 proven. 81 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2019-10-14 22:02:01,550 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869637772] [2019-10-14 22:02:01,550 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050659940] [2019-10-14 22:02:01,550 INFO L94 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 [2019-10-14 22:02:01,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:01,699 INFO L256 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-14 22:02:01,712 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:01,745 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-14 22:02:02,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 762 proven. 2 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2019-10-14 22:02:02,320 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:02:02,320 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 12 [2019-10-14 22:02:02,320 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76126499] [2019-10-14 22:02:02,321 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 22:02:02,321 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:02,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 22:02:02,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-10-14 22:02:02,322 INFO L87 Difference]: Start difference. First operand 2650 states and 3066 transitions. Second operand 12 states. [2019-10-14 22:02:04,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:04,457 INFO L93 Difference]: Finished difference Result 5398 states and 6267 transitions. [2019-10-14 22:02:04,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 22:02:04,458 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 536 [2019-10-14 22:02:04,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:04,470 INFO L225 Difference]: With dead ends: 5398 [2019-10-14 22:02:04,471 INFO L226 Difference]: Without dead ends: 2897 [2019-10-14 22:02:04,477 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 574 GetRequests, 555 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2019-10-14 22:02:04,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2897 states. [2019-10-14 22:02:04,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2897 to 2642. [2019-10-14 22:02:04,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2642 states. [2019-10-14 22:02:04,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2642 states to 2642 states and 2952 transitions. [2019-10-14 22:02:04,546 INFO L78 Accepts]: Start accepts. Automaton has 2642 states and 2952 transitions. Word has length 536 [2019-10-14 22:02:04,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:04,547 INFO L462 AbstractCegarLoop]: Abstraction has 2642 states and 2952 transitions. [2019-10-14 22:02:04,547 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 22:02:04,547 INFO L276 IsEmpty]: Start isEmpty. Operand 2642 states and 2952 transitions. [2019-10-14 22:02:04,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 563 [2019-10-14 22:02:04,567 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:04,567 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:04,781 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:04,781 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:04,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:04,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1282643571, now seen corresponding path program 2 times [2019-10-14 22:02:04,782 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:04,783 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540457985] [2019-10-14 22:02:04,783 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:04,783 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:04,783 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:04,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:04,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:04,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:05,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:05,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:05,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:05,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:05,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1153 backedges. 741 proven. 162 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2019-10-14 22:02:05,941 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540457985] [2019-10-14 22:02:05,941 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134829983] [2019-10-14 22:02:05,941 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2019-10-14 22:02:06,107 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 22:02:06,108 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 22:02:06,109 INFO L256 TraceCheckSpWp]: Trace formula consists of 856 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 22:02:06,116 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:06,153 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:02:06,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1153 backedges. 788 proven. 2 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2019-10-14 22:02:06,494 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:02:06,495 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5] total 17 [2019-10-14 22:02:06,495 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887895346] [2019-10-14 22:02:06,496 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 22:02:06,496 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:06,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 22:02:06,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2019-10-14 22:02:06,497 INFO L87 Difference]: Start difference. First operand 2642 states and 2952 transitions. Second operand 17 states.