/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.1 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id2_b3_o2.c
--------------------------------------------------------------------------------
This is Ultimate 0.1.25-c90d42b
[2020-09-25 10:01:28,113 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2020-09-25 10:01:28,117 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2020-09-25 10:01:28,159 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-09-25 10:01:28,159 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-09-25 10:01:28,167 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-09-25 10:01:28,170 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-09-25 10:01:28,173 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2020-09-25 10:01:28,176 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-09-25 10:01:28,179 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-09-25 10:01:28,180 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2020-09-25 10:01:28,181 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-09-25 10:01:28,181 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-09-25 10:01:28,184 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-09-25 10:01:28,188 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-09-25 10:01:28,190 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-09-25 10:01:28,192 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-09-25 10:01:28,193 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-09-25 10:01:28,195 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-09-25 10:01:28,203 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2020-09-25 10:01:28,205 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-09-25 10:01:28,206 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-09-25 10:01:28,208 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2020-09-25 10:01:28,208 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-09-25 10:01:28,225 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-09-25 10:01:28,226 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-09-25 10:01:28,226 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-09-25 10:01:28,227 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-09-25 10:01:28,227 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-09-25 10:01:28,230 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-09-25 10:01:28,231 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-09-25 10:01:28,231 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-09-25 10:01:28,232 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-09-25 10:01:28,237 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values
[2020-09-25 10:01:28,238 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-09-25 10:01:28,239 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values
[2020-09-25 10:01:28,239 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-09-25 10:01:28,240 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-09-25 10:01:28,240 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
[2020-09-25 10:01:28,241 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values
[2020-09-25 10:01:28,242 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2020-09-25 10:01:28,243 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2020-09-25 10:01:28,287 INFO L113 SettingsManager]: Loading preferences was successful
[2020-09-25 10:01:28,287 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2020-09-25 10:01:28,289 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-09-25 10:01:28,289 INFO L138 SettingsManager]: * Create parallel compositions if possible=false
[2020-09-25 10:01:28,290 INFO L138 SettingsManager]: * Use SBE=true
[2020-09-25 10:01:28,290 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-09-25 10:01:28,290 INFO L138 SettingsManager]: * sizeof long=4
[2020-09-25 10:01:28,291 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2020-09-25 10:01:28,291 INFO L138 SettingsManager]: * sizeof POINTER=4
[2020-09-25 10:01:28,291 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2020-09-25 10:01:28,292 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2020-09-25 10:01:28,292 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-09-25 10:01:28,292 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2020-09-25 10:01:28,293 INFO L138 SettingsManager]: * sizeof long double=12
[2020-09-25 10:01:28,293 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2020-09-25 10:01:28,293 INFO L138 SettingsManager]: * Use constant arrays=true
[2020-09-25 10:01:28,294 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2020-09-25 10:01:28,294 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-09-25 10:01:28,294 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2020-09-25 10:01:28,294 INFO L138 SettingsManager]: * To the following directory=./dump/
[2020-09-25 10:01:28,294 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2020-09-25 10:01:28,295 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-25 10:01:28,295 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-09-25 10:01:28,295 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2020-09-25 10:01:28,295 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-09-25 10:01:28,295 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL
[2020-09-25 10:01:28,296 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-09-25 10:01:28,296 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-09-25 10:01:28,296 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE
[2020-09-25 10:01:28,296 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true;
[2020-09-25 10:01:28,730 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2020-09-25 10:01:28,748 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-09-25 10:01:28,752 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-09-25 10:01:28,754 INFO L271 PluginConnector]: Initializing CDTParser...
[2020-09-25 10:01:28,754 INFO L275 PluginConnector]: CDTParser initialized
[2020-09-25 10:01:28,756 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_b3_o2.c
[2020-09-25 10:01:28,846 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6f343bfda/b92549f388f54aa7af8cea1ddfa2d259/FLAGf81780716
[2020-09-25 10:01:29,381 INFO L306 CDTParser]: Found 1 translation units.
[2020-09-25 10:01:29,382 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id2_b3_o2.c
[2020-09-25 10:01:29,390 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6f343bfda/b92549f388f54aa7af8cea1ddfa2d259/FLAGf81780716
[2020-09-25 10:01:29,717 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6f343bfda/b92549f388f54aa7af8cea1ddfa2d259
[2020-09-25 10:01:29,730 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-09-25 10:01:29,736 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2020-09-25 10:01:29,737 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-09-25 10:01:29,737 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-09-25 10:01:29,742 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2020-09-25 10:01:29,743 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:01:29" (1/1) ...
[2020-09-25 10:01:29,747 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@321fecde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:01:29, skipping insertion in model container
[2020-09-25 10:01:29,747 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:01:29" (1/1) ...
[2020-09-25 10:01:29,756 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2020-09-25 10:01:29,783 INFO L178 MainTranslator]: Built tables and reachable declarations
[2020-09-25 10:01:29,997 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-09-25 10:01:30,003 INFO L203 MainTranslator]: Completed pre-run
[2020-09-25 10:01:30,025 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-09-25 10:01:30,043 INFO L208 MainTranslator]: Completed translation
[2020-09-25 10:01:30,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:01:30 WrapperNode
[2020-09-25 10:01:30,044 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-09-25 10:01:30,045 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-09-25 10:01:30,045 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2020-09-25 10:01:30,045 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2020-09-25 10:01:30,063 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:01:30" (1/1) ...
[2020-09-25 10:01:30,064 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:01:30" (1/1) ...
[2020-09-25 10:01:30,071 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:01:30" (1/1) ...
[2020-09-25 10:01:30,071 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:01:30" (1/1) ...
[2020-09-25 10:01:30,153 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:01:30" (1/1) ...
[2020-09-25 10:01:30,156 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:01:30" (1/1) ...
[2020-09-25 10:01:30,157 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:01:30" (1/1) ...
[2020-09-25 10:01:30,163 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-09-25 10:01:30,164 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-09-25 10:01:30,164 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2020-09-25 10:01:30,164 INFO L275 PluginConnector]: RCFGBuilder initialized
[2020-09-25 10:01:30,165 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:01:30" (1/1) ...
No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-25 10:01:30,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-09-25 10:01:30,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-09-25 10:01:30,233 INFO L138 BoogieDeclarations]: Found implementation of procedure id
[2020-09-25 10:01:30,233 INFO L138 BoogieDeclarations]: Found implementation of procedure id2
[2020-09-25 10:01:30,233 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2020-09-25 10:01:30,234 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint
[2020-09-25 10:01:30,234 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-09-25 10:01:30,234 INFO L130 BoogieDeclarations]: Found specification of procedure id
[2020-09-25 10:01:30,234 INFO L130 BoogieDeclarations]: Found specification of procedure id2
[2020-09-25 10:01:30,235 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2020-09-25 10:01:30,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-09-25 10:01:30,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-09-25 10:01:30,453 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-09-25 10:01:30,453 INFO L295 CfgBuilder]: Removed 0 assume(true) statements.
[2020-09-25 10:01:30,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:01:30 BoogieIcfgContainer
[2020-09-25 10:01:30,459 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-09-25 10:01:30,461 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-09-25 10:01:30,461 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2020-09-25 10:01:30,465 INFO L275 PluginConnector]: TraceAbstraction initialized
[2020-09-25 10:01:30,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 10:01:29" (1/3) ...
[2020-09-25 10:01:30,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fc758d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:01:30, skipping insertion in model container
[2020-09-25 10:01:30,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:01:30" (2/3) ...
[2020-09-25 10:01:30,467 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fc758d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:01:30, skipping insertion in model container
[2020-09-25 10:01:30,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:01:30" (3/3) ...
[2020-09-25 10:01:30,470 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_b3_o2.c
[2020-09-25 10:01:30,489 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-09-25 10:01:30,499 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-09-25 10:01:30,525 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-09-25 10:01:30,560 INFO L375 AbstractCegarLoop]: Interprodecural is true
[2020-09-25 10:01:30,560 INFO L376 AbstractCegarLoop]: Hoare is true
[2020-09-25 10:01:30,560 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-09-25 10:01:30,560 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-09-25 10:01:30,561 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-09-25 10:01:30,561 INFO L380 AbstractCegarLoop]: Difference is false
[2020-09-25 10:01:30,561 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-09-25 10:01:30,561 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-09-25 10:01:30,607 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states.
[2020-09-25 10:01:30,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17
[2020-09-25 10:01:30,616 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-25 10:01:30,617 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 10:01:30,622 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 10:01:30,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 10:01:30,629 INFO L82 PathProgramCache]: Analyzing trace with hash 875745540, now seen corresponding path program 1 times
[2020-09-25 10:01:30,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 10:01:30,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1761057537]
[2020-09-25 10:01:30,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 10:01:30,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 10:01:30,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:01:30,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 10:01:30,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25
[2020-09-25 10:01:30,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 10:01:30,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74
[2020-09-25 10:01:30,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 10:01:30,838 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1
[2020-09-25 10:01:30,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-09-25 10:01:30,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18
[2020-09-25 10:01:30,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6
[2020-09-25 10:01:30,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3
[2020-09-25 10:01:30,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 10:01:30,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 10:01:30,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:01:30,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 10:01:30,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-25 10:01:30,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 10:01:30,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3
[2020-09-25 10:01:30,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 10:01:30,918 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1
[2020-09-25 10:01:30,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 10:01:30,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 10:01:30,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 10:01:30,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 10:01:30,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2020-09-25 10:01:30,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 10:01:30,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:01:30,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 10:01:30,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-25 10:01:30,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 10:01:30,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20
[2020-09-25 10:01:30,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 10:01:30,952 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1
[2020-09-25 10:01:30,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3
[2020-09-25 10:01:30,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 10:01:30,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6
[2020-09-25 10:01:30,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 10:01:30,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-25 10:01:30,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1761057537]
[2020-09-25 10:01:30,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-25 10:01:30,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-09-25 10:01:30,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598450910]
[2020-09-25 10:01:30,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-09-25 10:01:30,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 10:01:31,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-09-25 10:01:31,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-09-25 10:01:31,017 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 5 states.
[2020-09-25 10:01:31,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 10:01:31,120 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions.
[2020-09-25 10:01:31,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states.
[2020-09-25 10:01:31,122 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16
[2020-09-25 10:01:31,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 10:01:31,136 INFO L225 Difference]: With dead ends: 51
[2020-09-25 10:01:31,136 INFO L226 Difference]: Without dead ends: 36
[2020-09-25 10:01:31,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-09-25 10:01:31,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states.
[2020-09-25 10:01:31,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36.
[2020-09-25 10:01:31,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states.
[2020-09-25 10:01:31,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions.
[2020-09-25 10:01:31,196 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 16
[2020-09-25 10:01:31,197 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-25 10:01:31,197 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions.
[2020-09-25 10:01:31,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-09-25 10:01:31,197 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions.
[2020-09-25 10:01:31,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2020-09-25 10:01:31,200 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-25 10:01:31,200 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 10:01:31,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-09-25 10:01:31,201 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 10:01:31,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 10:01:31,202 INFO L82 PathProgramCache]: Analyzing trace with hash 71846672, now seen corresponding path program 1 times
[2020-09-25 10:01:31,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 10:01:31,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1343056241]
[2020-09-25 10:01:31,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 10:01:31,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 10:01:31,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:01:31,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 10:01:31,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36
[2020-09-25 10:01:31,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 10:01:31,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 262
[2020-09-25 10:01:31,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 10:01:31,485 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1
[2020-09-25 10:01:31,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7
[2020-09-25 10:01:31,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23
[2020-09-25 10:01:31,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12
[2020-09-25 10:01:31,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 10:01:31,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 10:01:31,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 10:01:31,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:01:31,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 10:01:31,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-25 10:01:31,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 10:01:31,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4
[2020-09-25 10:01:31,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 10:01:31,580 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1
[2020-09-25 10:01:31,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 10:01:31,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 10:01:31,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 10:01:31,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3
[2020-09-25 10:01:31,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2020-09-25 10:01:31,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 10:01:31,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:01:31,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 10:01:31,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22
[2020-09-25 10:01:31,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 10:01:31,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 166
[2020-09-25 10:01:31,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 10:01:31,769 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1
[2020-09-25 10:01:31,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6
[2020-09-25 10:01:31,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 10:01:31,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17
[2020-09-25 10:01:31,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 10:01:31,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2020-09-25 10:01:31,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 10:01:31,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:01:31,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 10:01:31,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-25 10:01:31,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 10:01:31,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27
[2020-09-25 10:01:31,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 10:01:31,881 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1
[2020-09-25 10:01:31,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3
[2020-09-25 10:01:31,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 10:01:31,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6
[2020-09-25 10:01:31,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 10:01:31,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-25 10:01:31,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1343056241]
[2020-09-25 10:01:31,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-25 10:01:31,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2020-09-25 10:01:31,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55030158]
[2020-09-25 10:01:31,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states
[2020-09-25 10:01:31,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 10:01:31,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2020-09-25 10:01:31,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56
[2020-09-25 10:01:31,917 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 8 states.
[2020-09-25 10:01:32,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 10:01:32,065 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions.
[2020-09-25 10:01:32,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states.
[2020-09-25 10:01:32,066 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25
[2020-09-25 10:01:32,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 10:01:32,067 INFO L225 Difference]: With dead ends: 66
[2020-09-25 10:01:32,068 INFO L226 Difference]: Without dead ends: 44
[2020-09-25 10:01:32,069 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110
[2020-09-25 10:01:32,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states.
[2020-09-25 10:01:32,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42.
[2020-09-25 10:01:32,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states.
[2020-09-25 10:01:32,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions.
[2020-09-25 10:01:32,078 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 25
[2020-09-25 10:01:32,079 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-25 10:01:32,079 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions.
[2020-09-25 10:01:32,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states.
[2020-09-25 10:01:32,079 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions.
[2020-09-25 10:01:32,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35
[2020-09-25 10:01:32,081 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-25 10:01:32,081 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 10:01:32,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-09-25 10:01:32,082 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 10:01:32,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 10:01:32,082 INFO L82 PathProgramCache]: Analyzing trace with hash -511991682, now seen corresponding path program 1 times
[2020-09-25 10:01:32,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 10:01:32,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1551606296]
[2020-09-25 10:01:32,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 10:01:32,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 10:01:32,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:01:32,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:01:32,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:01:32,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 10:01:32,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47
[2020-09-25 10:01:32,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3
[2020-09-25 10:01:32,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 770
[2020-09-25 10:01:32,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 10:01:32,868 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1
[2020-09-25 10:01:32,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7
[2020-09-25 10:01:32,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34
[2020-09-25 10:01:32,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12
[2020-09-25 10:01:32,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2
[2020-09-25 10:01:32,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 10:01:32,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 10:01:32,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:01:32,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 10:01:32,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-25 10:01:32,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 10:01:32,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2
[2020-09-25 10:01:32,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 10:01:32,931 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1
[2020-09-25 10:01:32,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 10:01:32,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 10:01:32,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 10:01:32,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-25 10:01:32,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2020-09-25 10:01:32,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 10:01:32,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:01:32,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:01:32,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:01:33,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 10:01:33,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33
[2020-09-25 10:01:33,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3
[2020-09-25 10:01:33,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 613
[2020-09-25 10:01:33,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 10:01:33,555 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1
[2020-09-25 10:01:33,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6
[2020-09-25 10:01:33,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 10:01:33,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28
[2020-09-25 10:01:33,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 10:01:33,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2020-09-25 10:01:33,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 10:01:33,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:01:33,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:01:33,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 10:01:33,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22
[2020-09-25 10:01:33,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-25 10:01:33,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108
[2020-09-25 10:01:33,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 10:01:33,722 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1
[2020-09-25 10:01:33,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3
[2020-09-25 10:01:33,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 10:01:33,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17
[2020-09-25 10:01:33,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 10:01:33,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2020-09-25 10:01:33,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 10:01:33,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:01:33,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 10:01:33,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-25 10:01:33,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 10:01:33,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5
[2020-09-25 10:01:33,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 10:01:33,748 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1
[2020-09-25 10:01:33,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 10:01:33,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 10:01:33,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 10:01:33,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 10:01:33,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2020-09-25 10:01:33,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1551606296]
[2020-09-25 10:01:33,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-25 10:01:33,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2020-09-25 10:01:33,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290659088]
[2020-09-25 10:01:33,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states
[2020-09-25 10:01:33,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 10:01:33,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2020-09-25 10:01:33,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56
[2020-09-25 10:01:33,758 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 8 states.
[2020-09-25 10:01:33,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 10:01:33,820 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions.
[2020-09-25 10:01:33,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states.
[2020-09-25 10:01:33,821 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34
[2020-09-25 10:01:33,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 10:01:33,823 INFO L225 Difference]: With dead ends: 69
[2020-09-25 10:01:33,823 INFO L226 Difference]: Without dead ends: 50
[2020-09-25 10:01:33,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72
[2020-09-25 10:01:33,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states.
[2020-09-25 10:01:33,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47.
[2020-09-25 10:01:33,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states.
[2020-09-25 10:01:33,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions.
[2020-09-25 10:01:33,834 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 34
[2020-09-25 10:01:33,834 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-25 10:01:33,834 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions.
[2020-09-25 10:01:33,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states.
[2020-09-25 10:01:33,835 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions.
[2020-09-25 10:01:33,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35
[2020-09-25 10:01:33,836 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-25 10:01:33,837 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 10:01:33,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-09-25 10:01:33,837 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 10:01:33,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 10:01:33,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1477652418, now seen corresponding path program 1 times
[2020-09-25 10:01:33,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 10:01:33,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1125804968]
[2020-09-25 10:01:33,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 10:01:33,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 10:01:33,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:01:33,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:01:34,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 10:01:34,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47
[2020-09-25 10:01:34,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-25 10:01:34,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 322
[2020-09-25 10:01:34,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 10:01:34,173 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1
[2020-09-25 10:01:34,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-09-25 10:01:34,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40
[2020-09-25 10:01:34,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6
[2020-09-25 10:01:34,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 10:01:34,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 10:01:34,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 10:01:34,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:01:34,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 10:01:34,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-25 10:01:34,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 10:01:34,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1
[2020-09-25 10:01:34,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 10:01:34,202 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1
[2020-09-25 10:01:34,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 10:01:34,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 10:01:34,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 10:01:34,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 10:01:34,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2020-09-25 10:01:34,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 10:01:34,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:01:34,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:01:34,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 10:01:34,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33
[2020-09-25 10:01:34,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-25 10:01:34,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 212
[2020-09-25 10:01:34,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 10:01:34,434 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1
[2020-09-25 10:01:34,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3
[2020-09-25 10:01:34,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 10:01:34,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28
[2020-09-25 10:01:34,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 10:01:34,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2020-09-25 10:01:34,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 10:01:34,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:01:34,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:01:34,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 10:01:34,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22
[2020-09-25 10:01:34,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-25 10:01:34,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60
[2020-09-25 10:01:34,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 10:01:34,515 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1
[2020-09-25 10:01:34,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-09-25 10:01:34,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10
[2020-09-25 10:01:34,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6
[2020-09-25 10:01:34,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 10:01:34,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2020-09-25 10:01:34,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 10:01:34,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 10:01:34,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 10:01:34,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-25 10:01:34,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 10:01:34,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17
[2020-09-25 10:01:34,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-09-25 10:01:34,605 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1
[2020-09-25 10:01:34,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3
[2020-09-25 10:01:34,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 10:01:34,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6
[2020-09-25 10:01:34,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 10:01:34,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2020-09-25 10:01:34,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1125804968]
[2020-09-25 10:01:34,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-25 10:01:34,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8
[2020-09-25 10:01:34,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130543347]
[2020-09-25 10:01:34,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states
[2020-09-25 10:01:34,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 10:01:34,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2020-09-25 10:01:34,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56
[2020-09-25 10:01:34,632 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 8 states.
[2020-09-25 10:01:34,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 10:01:34,727 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions.
[2020-09-25 10:01:34,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states.
[2020-09-25 10:01:34,731 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34
[2020-09-25 10:01:34,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 10:01:34,733 INFO L225 Difference]: With dead ends: 84
[2020-09-25 10:01:34,733 INFO L226 Difference]: Without dead ends: 57
[2020-09-25 10:01:34,736 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2020-09-25 10:01:34,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states.
[2020-09-25 10:01:34,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52.
[2020-09-25 10:01:34,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states.
[2020-09-25 10:01:34,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions.
[2020-09-25 10:01:34,750 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 34
[2020-09-25 10:01:34,751 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-25 10:01:34,751 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions.
[2020-09-25 10:01:34,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states.
[2020-09-25 10:01:34,751 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions.
[2020-09-25 10:01:34,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35
[2020-09-25 10:01:34,754 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-25 10:01:34,755 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 10:01:34,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-09-25 10:01:34,755 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 10:01:34,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 10:01:34,757 INFO L82 PathProgramCache]: Analyzing trace with hash -2109914946, now seen corresponding path program 1 times
[2020-09-25 10:01:34,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 10:01:34,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [910430199]
[2020-09-25 10:01:34,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 10:01:34,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-09-25 10:01:34,772 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2020-09-25 10:01:34,772 INFO L520 BasicCegarLoop]: Counterexample might be feasible
[2020-09-25 10:01:34,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-09-25 10:01:34,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 10:01:34 BoogieIcfgContainer
[2020-09-25 10:01:34,806 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-09-25 10:01:34,811 INFO L168 Benchmark]: Toolchain (without parser) took 5076.72 ms. Allocated memory was 140.0 MB in the beginning and 245.9 MB in the end (delta: 105.9 MB). Free memory was 103.6 MB in the beginning and 194.4 MB in the end (delta: -90.8 MB). Peak memory consumption was 15.1 MB. Max. memory is 7.1 GB.
[2020-09-25 10:01:34,813 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB.
[2020-09-25 10:01:34,815 INFO L168 Benchmark]: CACSL2BoogieTranslator took 307.01 ms. Allocated memory is still 140.0 MB. Free memory was 102.9 MB in the beginning and 93.0 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB.
[2020-09-25 10:01:34,817 INFO L168 Benchmark]: Boogie Preprocessor took 118.56 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 93.0 MB in the beginning and 182.2 MB in the end (delta: -89.2 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB.
[2020-09-25 10:01:34,823 INFO L168 Benchmark]: RCFGBuilder took 296.08 ms. Allocated memory is still 203.4 MB. Free memory was 182.2 MB in the beginning and 168.3 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB.
[2020-09-25 10:01:34,824 INFO L168 Benchmark]: TraceAbstraction took 4345.44 ms. Allocated memory was 203.4 MB in the beginning and 245.9 MB in the end (delta: 42.5 MB). Free memory was 168.3 MB in the beginning and 194.4 MB in the end (delta: -26.1 MB). Peak memory consumption was 16.4 MB. Max. memory is 7.1 GB.
[2020-09-25 10:01:34,835 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.19 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB.
* CACSL2BoogieTranslator took 307.01 ms. Allocated memory is still 140.0 MB. Free memory was 102.9 MB in the beginning and 93.0 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB.
* Boogie Preprocessor took 118.56 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 93.0 MB in the beginning and 182.2 MB in the end (delta: -89.2 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB.
* RCFGBuilder took 296.08 ms. Allocated memory is still 203.4 MB. Free memory was 182.2 MB in the beginning and 168.3 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB.
* TraceAbstraction took 4345.44 ms. Allocated memory was 203.4 MB in the beginning and 245.9 MB in the end (delta: 42.5 MB). Free memory was 168.3 MB in the beginning and 194.4 MB in the end (delta: -26.1 MB). Peak memory consumption was 16.4 MB. Max. memory is 7.1 GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- CounterExampleResult [Line: 25]: a call of __VERIFIER_error() is reachable
a call of __VERIFIER_error() is reachable
We found a FailurePath:
[L22] unsigned int input = __VERIFIER_nondet_uint();
[L23] CALL, EXPR id(input)
[L8] COND FALSE !(x==0)
[L9] CALL, EXPR id2(x-1)
[L15] COND FALSE !(x==0)
[L16] CALL, EXPR id(x-1)
[L8] COND TRUE x==0
[L8] return 0;
[L16] RET, EXPR id(x-1)
[L16] unsigned int ret = id(x-1) + 1;
[L17] COND FALSE !(ret > 3)
[L18] return ret;
[L9] RET, EXPR id2(x-1)
[L9] unsigned int ret = id2(x-1) + 1;
[L10] COND FALSE !(ret > 3)
[L11] return ret;
[L23] RET, EXPR id(input)
[L23] unsigned int result = id(input);
[L24] COND TRUE result == 2
[L25] __VERIFIER_error()
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 5 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.2s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 159 SDtfs, 16 SDslu, 780 SDs, 0 SdLazy, 113 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 63 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 10 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 3.3s InterpolantComputationTime, 143 NumberOfCodeBlocks, 143 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 105 ConstructedInterpolants, 0 QuantifiedInterpolants, 8295 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 3 PerfectInterpolantSequences, 6/8 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available
RESULT: Ultimate proved your program to be incorrect!
Received shutdown request...