/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded/rekcba_nxt.1.M1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:39:48,098 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:39:48,101 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:39:48,115 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:39:48,116 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:39:48,117 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:39:48,118 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:39:48,120 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:39:48,129 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:39:48,130 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:39:48,131 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:39:48,132 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:39:48,132 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:39:48,133 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:39:48,134 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:39:48,135 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:39:48,136 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:39:48,137 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:39:48,138 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:39:48,140 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:39:48,142 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:39:48,143 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:39:48,144 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:39:48,144 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:39:48,146 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:39:48,149 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-23 22:39:48,150 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-23 22:39:48,150 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-23 22:39:48,151 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-23 22:39:48,152 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-23 22:39:48,152 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-23 22:39:48,153 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-23 22:39:48,153 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-23 22:39:48,153 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 22:39:48,154 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 22:39:48,155 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 22:39:48,156 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 [2019-11-23 22:39:48,169 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:39:48,170 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:39:48,171 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:39:48,171 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:39:48,171 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:39:48,172 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:39:48,172 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:39:48,172 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:39:48,172 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:39:48,172 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:39:48,173 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:39:48,173 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:39:48,173 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:39:48,173 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:39:48,173 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:39:48,173 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:39:48,174 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:39:48,174 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:39:48,174 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:39:48,174 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:39:48,177 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:39:48,177 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:39:48,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:39:48,177 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:39:48,178 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:39:48,178 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:39:48,178 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:39:48,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:39:48,178 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:39:48,178 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:39:48,431 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:39:48,444 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:39:48,448 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:39:48,449 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:39:48,450 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:39:48,451 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded/rekcba_nxt.1.M1-1.c [2019-11-23 22:39:48,525 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7f1af2b0/d2508b2d41ac45ebb08485a4eb4f3bb3/FLAGf20a94e8e [2019-11-23 22:39:49,144 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:39:49,145 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded/rekcba_nxt.1.M1-1.c [2019-11-23 22:39:49,170 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7f1af2b0/d2508b2d41ac45ebb08485a4eb4f3bb3/FLAGf20a94e8e [2019-11-23 22:39:49,367 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7f1af2b0/d2508b2d41ac45ebb08485a4eb4f3bb3 [2019-11-23 22:39:49,376 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:39:49,377 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:39:49,378 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:39:49,378 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:39:49,382 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:39:49,382 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:39:49" (1/1) ... [2019-11-23 22:39:49,385 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f9fd9b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:39:49, skipping insertion in model container [2019-11-23 22:39:49,385 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:39:49" (1/1) ... [2019-11-23 22:39:49,392 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:39:49,443 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:39:50,125 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:39:50,155 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:39:50,401 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:39:50,463 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:39:50,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:39:50 WrapperNode [2019-11-23 22:39:50,464 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:39:50,465 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:39:50,466 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:39:50,466 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:39:50,475 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:39:50" (1/1) ... [2019-11-23 22:39:50,561 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:39:50" (1/1) ... [2019-11-23 22:39:51,050 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:39:51,050 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:39:51,050 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:39:51,050 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:39:51,061 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:39:50" (1/1) ... [2019-11-23 22:39:51,061 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:39:50" (1/1) ... [2019-11-23 22:39:51,132 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:39:50" (1/1) ... [2019-11-23 22:39:51,133 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:39:50" (1/1) ... [2019-11-23 22:39:51,357 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:39:50" (1/1) ... [2019-11-23 22:39:51,471 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:39:50" (1/1) ... [2019-11-23 22:39:51,538 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:39:50" (1/1) ... [2019-11-23 22:39:51,614 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:39:51,615 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:39:51,615 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:39:51,615 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:39:51,616 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:39:50" (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 [2019-11-23 22:39:51,694 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 22:39:51,696 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:39:51,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 22:39:51,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:39:51,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-23 22:39:51,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:39:51,698 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:40:03,054 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:40:03,055 INFO L284 CfgBuilder]: Removed 1850 assume(true) statements. [2019-11-23 22:40:03,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:40:03 BoogieIcfgContainer [2019-11-23 22:40:03,058 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:40:03,059 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:40:03,059 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:40:03,062 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:40:03,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:39:49" (1/3) ... [2019-11-23 22:40:03,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dbc4ddd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:40:03, skipping insertion in model container [2019-11-23 22:40:03,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:39:50" (2/3) ... [2019-11-23 22:40:03,064 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dbc4ddd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:40:03, skipping insertion in model container [2019-11-23 22:40:03,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:40:03" (3/3) ... [2019-11-23 22:40:03,066 INFO L109 eAbstractionObserver]: Analyzing ICFG rekcba_nxt.1.M1-1.c [2019-11-23 22:40:03,076 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:40:03,087 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:40:03,099 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:40:03,141 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:40:03,141 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:40:03,141 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:40:03,142 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:40:03,142 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:40:03,142 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:40:03,142 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:40:03,142 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:40:03,191 INFO L276 IsEmpty]: Start isEmpty. Operand 3086 states. [2019-11-23 22:40:03,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2019-11-23 22:40:03,226 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:40:03,227 INFO L410 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, 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, 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, 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, 1, 1, 1, 1, 1, 1] [2019-11-23 22:40:03,228 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:40:03,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:40:03,232 INFO L82 PathProgramCache]: Analyzing trace with hash 2006193049, now seen corresponding path program 1 times [2019-11-23 22:40:03,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:40:03,239 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989382850] [2019-11-23 22:40:03,239 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:40:09,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat