/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 SequenceOfStatements --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=0.2 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem05_label01.c


--------------------------------------------------------------------------------


This is Ultimate 0.1.25-adbd35c
[2020-10-14 19:33:58,162 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-10-14 19:33:58,165 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-10-14 19:33:58,190 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-10-14 19:33:58,190 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-10-14 19:33:58,192 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-10-14 19:33:58,193 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-10-14 19:33:58,195 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-10-14 19:33:58,197 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-10-14 19:33:58,197 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-10-14 19:33:58,199 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-10-14 19:33:58,200 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-10-14 19:33:58,200 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-10-14 19:33:58,201 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-10-14 19:33:58,202 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-10-14 19:33:58,203 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-10-14 19:33:58,204 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-10-14 19:33:58,205 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-10-14 19:33:58,207 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-10-14 19:33:58,209 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-10-14 19:33:58,210 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-10-14 19:33:58,212 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-10-14 19:33:58,213 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-10-14 19:33:58,214 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-10-14 19:33:58,216 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-10-14 19:33:58,216 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-10-14 19:33:58,217 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-10-14 19:33:58,218 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-10-14 19:33:58,218 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-10-14 19:33:58,219 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-10-14 19:33:58,219 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-10-14 19:33:58,220 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-10-14 19:33:58,221 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-10-14 19:33:58,221 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-10-14 19:33:58,226 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-10-14 19:33:58,226 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-10-14 19:33:58,227 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-10-14 19:33:58,228 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-10-14 19:33:58,228 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2020-10-14 19:33:58,229 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2020-10-14 19:33:58,230 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-10-14 19:33:58,231 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
[2020-10-14 19:33:58,281 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-10-14 19:33:58,282 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-10-14 19:33:58,285 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-10-14 19:33:58,285 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-10-14 19:33:58,285 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-10-14 19:33:58,286 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-10-14 19:33:58,286 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-10-14 19:33:58,286 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-10-14 19:33:58,286 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-10-14 19:33:58,286 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-10-14 19:33:58,287 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-10-14 19:33:58,287 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-10-14 19:33:58,289 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-10-14 19:33:58,289 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-10-14 19:33:58,289 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-10-14 19:33:58,290 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-10-14 19:33:58,290 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-10-14 19:33:58,291 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-10-14 19:33:58,291 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-10-14 19:33:58,291 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-10-14 19:33:58,292 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-10-14 19:33:58,292 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-10-14 19:33:58,292 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-10-14 19:33:58,292 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-10-14 19:33:58,292 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-10-14 19:33:58,293 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-10-14 19:33:58,293 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-10-14 19:33:58,293 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-10-14 19:33:58,293 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-10-14 19:33:58,293 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 -> SequenceOfStatements
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=0.2;log-additional-information=true;unknown-allowed=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=0.2;log-additional-information=true;unknown-allowed=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=0.2;log-additional-information=true;unknown-allowed=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=0.2;log-additional-information=true;unknown-allowed=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=0.2;log-additional-information=true;unknown-allowed=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=0.2;log-additional-information=true;unknown-allowed=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=0.2;log-additional-information=true;unknown-allowed=true;
[2020-10-14 19:33:58,650 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-10-14 19:33:58,665 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-10-14 19:33:58,669 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-10-14 19:33:58,671 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-10-14 19:33:58,671 INFO  L275        PluginConnector]: CDTParser initialized
[2020-10-14 19:33:58,672 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem05_label01.c
[2020-10-14 19:33:58,737 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8506dccaf/264a9fe3d0944ef48b2eede00a873373/FLAG5a2e8292a
[2020-10-14 19:33:59,575 INFO  L306              CDTParser]: Found 1 translation units.
[2020-10-14 19:33:59,576 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem05_label01.c
[2020-10-14 19:33:59,622 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8506dccaf/264a9fe3d0944ef48b2eede00a873373/FLAG5a2e8292a
[2020-10-14 19:34:00,058 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8506dccaf/264a9fe3d0944ef48b2eede00a873373
[2020-10-14 19:34:00,070 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-10-14 19:34:00,072 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-10-14 19:34:00,075 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-10-14 19:34:00,075 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-10-14 19:34:00,079 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-10-14 19:34:00,080 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:34:00" (1/1) ...
[2020-10-14 19:34:00,084 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e979d3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:34:00, skipping insertion in model container
[2020-10-14 19:34:00,084 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:34:00" (1/1) ...
[2020-10-14 19:34:00,093 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-10-14 19:34:00,381 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-10-14 19:34:03,027 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-10-14 19:34:03,037 INFO  L203         MainTranslator]: Completed pre-run
[2020-10-14 19:34:04,084 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-10-14 19:34:04,136 INFO  L208         MainTranslator]: Completed translation
[2020-10-14 19:34:04,136 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:34:04 WrapperNode
[2020-10-14 19:34:04,136 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-10-14 19:34:04,137 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-10-14 19:34:04,137 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-10-14 19:34:04,137 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-10-14 19:34:04,150 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:34:04" (1/1) ...
[2020-10-14 19:34:04,150 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:34:04" (1/1) ...
[2020-10-14 19:34:04,231 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:34:04" (1/1) ...
[2020-10-14 19:34:04,231 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:34:04" (1/1) ...
[2020-10-14 19:34:04,386 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:34:04" (1/1) ...
[2020-10-14 19:34:04,454 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:34:04" (1/1) ...
[2020-10-14 19:34:04,495 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:34:04" (1/1) ...
[2020-10-14 19:34:04,557 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-10-14 19:34:04,557 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-10-14 19:34:04,558 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-10-14 19:34:04,558 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-10-14 19:34:04,559 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:34:04" (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
[2020-10-14 19:34:04,643 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-10-14 19:34:04,643 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-10-14 19:34:04,643 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2020-10-14 19:34:04,643 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2020-10-14 19:34:04,644 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output3
[2020-10-14 19:34:04,645 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output4
[2020-10-14 19:34:04,645 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output5
[2020-10-14 19:34:04,647 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output6
[2020-10-14 19:34:04,647 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output7
[2020-10-14 19:34:04,648 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output8
[2020-10-14 19:34:04,648 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-10-14 19:34:04,648 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2020-10-14 19:34:04,648 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2020-10-14 19:34:04,648 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output3
[2020-10-14 19:34:04,648 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output4
[2020-10-14 19:34:04,649 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output5
[2020-10-14 19:34:04,650 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output6
[2020-10-14 19:34:04,650 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output7
[2020-10-14 19:34:04,650 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output8
[2020-10-14 19:34:04,650 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-10-14 19:34:04,650 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-10-14 19:34:04,651 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2020-10-14 19:34:04,651 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-10-14 19:34:04,651 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-10-14 19:34:04,651 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-10-14 19:34:13,287 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-10-14 19:34:13,288 INFO  L295             CfgBuilder]: Removed 1 assume(true) statements.
[2020-10-14 19:34:13,310 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 07:34:13 BoogieIcfgContainer
[2020-10-14 19:34:13,311 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-10-14 19:34:13,316 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-10-14 19:34:13,316 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-10-14 19:34:13,319 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-10-14 19:34:13,320 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 07:34:00" (1/3) ...
[2020-10-14 19:34:13,321 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@552261bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 07:34:13, skipping insertion in model container
[2020-10-14 19:34:13,321 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:34:04" (2/3) ...
[2020-10-14 19:34:13,322 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@552261bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 07:34:13, skipping insertion in model container
[2020-10-14 19:34:13,322 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 07:34:13" (3/3) ...
[2020-10-14 19:34:13,324 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem05_label01.c
[2020-10-14 19:34:13,335 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-10-14 19:34:13,348 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-10-14 19:34:13,360 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-10-14 19:34:13,393 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-10-14 19:34:13,393 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-10-14 19:34:13,393 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-10-14 19:34:13,393 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-10-14 19:34:13,393 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-10-14 19:34:13,394 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-10-14 19:34:13,394 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-10-14 19:34:13,394 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-10-14 19:34:13,445 INFO  L276                IsEmpty]: Start isEmpty. Operand 2222 states.
[2020-10-14 19:34:13,539 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1665
[2020-10-14 19:34:13,540 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-14 19:34:13,542 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-10-14 19:34:13,543 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-14 19:34:13,550 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-14 19:34:13,551 INFO  L82        PathProgramCache]: Analyzing trace with hash -1495071831, now seen corresponding path program 1 times
[2020-10-14 19:34:13,560 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-14 19:34:13,561 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338032004]
[2020-10-14 19:34:13,562 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-14 19:34:14,579 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-14 19:34:15,291 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 19:34:19,727 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-14 19:34:19,728 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 1686
[2020-10-14 19:34:19,728 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-14 19:34:19,728 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5139
[2020-10-14 19:34:19,730 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-10-14 19:34:19,730 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.2
[2020-10-14 19:34:19,731 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 20
[2020-10-14 19:34:19,731 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 5
[2020-10-14 19:34:19,731 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1680
[2020-10-14 19:34:19,731 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 3
[2020-10-14 19:34:21,243 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-14 19:34:21,247 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-14 19:34:21,250 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 19:34:21,255 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-14 19:34:21,256 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-14 19:34:21,256 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-14 19:34:21,256 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 7
[2020-10-14 19:34:21,257 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-10-14 19:34:21,257 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.2
[2020-10-14 19:34:21,257 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-14 19:34:21,257 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-14 19:34:21,257 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 2
[2020-10-14 19:34:21,258 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-10-14 19:34:23,408 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-14 19:34:23,409 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338032004]
[2020-10-14 19:34:23,411 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-10-14 19:34:23,411 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-10-14 19:34:23,412 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520812247]
[2020-10-14 19:34:23,422 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-10-14 19:34:23,422 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-14 19:34:23,436 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-10-14 19:34:23,437 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-10-14 19:34:23,440 INFO  L87              Difference]: Start difference. First operand 2222 states. Second operand 4 states.
[2020-10-14 19:34:39,926 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-14 19:34:39,926 INFO  L93              Difference]: Finished difference Result 6360 states and 11961 transitions.
[2020-10-14 19:34:39,927 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-10-14 19:34:39,929 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 1664
[2020-10-14 19:34:39,941 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-14 19:34:39,984 INFO  L225             Difference]: With dead ends: 6360
[2020-10-14 19:34:39,984 INFO  L226             Difference]: Without dead ends: 4074
[2020-10-14 19:34:39,997 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-10-14 19:34:40,023 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4074 states.
[2020-10-14 19:34:40,229 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4074 to 4004.
[2020-10-14 19:34:40,231 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 4004 states.
[2020-10-14 19:34:40,248 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4004 states to 4004 states and 6504 transitions.
[2020-10-14 19:34:40,250 INFO  L78                 Accepts]: Start accepts. Automaton has 4004 states and 6504 transitions. Word has length 1664
[2020-10-14 19:34:40,254 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-14 19:34:40,254 INFO  L479      AbstractCegarLoop]: Abstraction has 4004 states and 6504 transitions.
[2020-10-14 19:34:40,255 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-10-14 19:34:40,255 INFO  L276                IsEmpty]: Start isEmpty. Operand 4004 states and 6504 transitions.
[2020-10-14 19:34:40,395 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1676
[2020-10-14 19:34:40,395 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-14 19:34:40,397 INFO  L422         BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-10-14 19:34:40,398 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-10-14 19:34:40,398 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-14 19:34:40,398 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-14 19:34:40,400 INFO  L82        PathProgramCache]: Analyzing trace with hash 1859532858, now seen corresponding path program 1 times
[2020-10-14 19:34:40,401 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-14 19:34:40,401 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1885816866]
[2020-10-14 19:34:40,402 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-14 19:34:40,831 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-14 19:34:41,162 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 19:34:41,756 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 19:34:45,836 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-14 19:34:45,836 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 1699
[2020-10-14 19:34:45,836 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-10-14 19:34:45,837 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5001
[2020-10-14 19:34:45,840 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-10-14 19:34:45,841 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.2
[2020-10-14 19:34:45,841 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 18
[2020-10-14 19:34:45,841 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 21
[2020-10-14 19:34:45,841 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1677
[2020-10-14 19:34:45,841 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 4
[2020-10-14 19:34:47,112 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-14 19:34:47,115 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-14 19:34:47,117 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 19:34:47,121 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-14 19:34:47,121 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-14 19:34:47,122 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-14 19:34:47,122 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5
[2020-10-14 19:34:47,122 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-10-14 19:34:47,122 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.2
[2020-10-14 19:34:47,129 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-10-14 19:34:47,129 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-14 19:34:47,129 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-10-14 19:34:47,130 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 7
[2020-10-14 19:34:47,150 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2020-10-14 19:34:47,153 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-14 19:34:47,157 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 19:34:47,176 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-14 19:34:47,177 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 12
[2020-10-14 19:34:47,177 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-14 19:34:47,177 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 21
[2020-10-14 19:34:47,177 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-10-14 19:34:47,178 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.2
[2020-10-14 19:34:47,178 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-14 19:34:47,178 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-14 19:34:47,178 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 6
[2020-10-14 19:34:47,179 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-10-14 19:34:50,801 INFO  L134       CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-14 19:34:50,801 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1885816866]
[2020-10-14 19:34:50,801 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-10-14 19:34:50,802 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6
[2020-10-14 19:34:50,802 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300344597]
[2020-10-14 19:34:50,806 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-10-14 19:34:50,806 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-14 19:34:50,806 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-10-14 19:34:50,807 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-10-14 19:34:50,807 INFO  L87              Difference]: Start difference. First operand 4004 states and 6504 transitions. Second operand 6 states.
[2020-10-14 19:35:20,341 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-14 19:35:20,342 INFO  L93              Difference]: Finished difference Result 11791 states and 20326 transitions.
[2020-10-14 19:35:20,343 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2020-10-14 19:35:20,343 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 1675
[2020-10-14 19:35:20,347 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-14 19:35:20,388 INFO  L225             Difference]: With dead ends: 11791
[2020-10-14 19:35:20,388 INFO  L226             Difference]: Without dead ends: 7793
[2020-10-14 19:35:20,408 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56
[2020-10-14 19:35:20,418 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7793 states.
[2020-10-14 19:35:20,608 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7793 to 7611.
[2020-10-14 19:35:20,608 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 7611 states.
[2020-10-14 19:35:20,648 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7611 states to 7611 states and 12340 transitions.
[2020-10-14 19:35:20,648 INFO  L78                 Accepts]: Start accepts. Automaton has 7611 states and 12340 transitions. Word has length 1675
[2020-10-14 19:35:20,652 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-14 19:35:20,652 INFO  L479      AbstractCegarLoop]: Abstraction has 7611 states and 12340 transitions.
[2020-10-14 19:35:20,652 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-10-14 19:35:20,652 INFO  L276                IsEmpty]: Start isEmpty. Operand 7611 states and 12340 transitions.
[2020-10-14 19:35:20,800 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1677
[2020-10-14 19:35:20,800 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-14 19:35:20,802 INFO  L422         BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-10-14 19:35:20,802 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-10-14 19:35:20,803 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-14 19:35:20,803 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-14 19:35:20,804 INFO  L82        PathProgramCache]: Analyzing trace with hash -1746876955, now seen corresponding path program 1 times
[2020-10-14 19:35:20,804 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-14 19:35:20,804 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1736150009]
[2020-10-14 19:35:20,805 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-14 19:35:20,931 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-14 19:35:20,960 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 19:35:21,225 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 19:35:25,956 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-14 19:35:25,956 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 1700
[2020-10-14 19:35:25,957 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-10-14 19:35:25,957 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5022
[2020-10-14 19:35:25,957 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-10-14 19:35:25,957 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.2
[2020-10-14 19:35:25,957 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 32
[2020-10-14 19:35:25,957 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 22
[2020-10-14 19:35:25,957 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1273
[2020-10-14 19:35:25,958 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-14 19:35:28,489 WARN  L193               SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 35
[2020-10-14 19:35:29,185 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-14 19:35:29,187 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-14 19:35:29,190 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 19:35:29,192 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-14 19:35:29,192 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-14 19:35:29,193 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-14 19:35:29,193 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 4
[2020-10-14 19:35:29,193 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-10-14 19:35:29,193 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.2
[2020-10-14 19:35:29,194 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-10-14 19:35:29,194 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-14 19:35:29,194 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-10-14 19:35:29,194 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-10-14 19:35:29,231 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2020-10-14 19:35:29,235 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-14 19:35:29,237 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 19:35:29,247 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-14 19:35:29,247 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 13
[2020-10-14 19:35:29,247 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-14 19:35:29,248 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 11
[2020-10-14 19:35:29,248 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-10-14 19:35:29,248 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.2
[2020-10-14 19:35:29,248 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-14 19:35:29,248 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-14 19:35:29,249 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 7
[2020-10-14 19:35:29,249 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-10-14 19:35:42,704 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-14 19:35:42,704 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1736150009]
[2020-10-14 19:35:42,704 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-10-14 19:35:42,705 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23
[2020-10-14 19:35:42,705 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052010357]
[2020-10-14 19:35:42,706 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 23 states
[2020-10-14 19:35:42,706 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-14 19:35:42,707 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants.
[2020-10-14 19:35:42,707 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506
[2020-10-14 19:35:42,707 INFO  L87              Difference]: Start difference. First operand 7611 states and 12340 transitions. Second operand 23 states.
[2020-10-14 19:35:49,343 WARN  L193               SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 67
[2020-10-14 19:35:51,743 WARN  L193               SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 73
[2020-10-14 19:35:52,780 WARN  L193               SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 73
[2020-10-14 19:36:41,488 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-14 19:36:41,489 INFO  L93              Difference]: Finished difference Result 16553 states and 27338 transitions.
[2020-10-14 19:36:41,489 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. 
[2020-10-14 19:36:41,490 INFO  L78                 Accepts]: Start accepts. Automaton has 23 states. Word has length 1676
[2020-10-14 19:36:41,493 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-14 19:36:41,531 INFO  L225             Difference]: With dead ends: 16553
[2020-10-14 19:36:41,532 INFO  L226             Difference]: Without dead ends: 8948
[2020-10-14 19:36:41,551 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=212, Invalid=1428, Unknown=0, NotChecked=0, Total=1640
[2020-10-14 19:36:41,562 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8948 states.
[2020-10-14 19:36:41,725 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8948 to 8902.
[2020-10-14 19:36:41,725 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 8902 states.
[2020-10-14 19:36:41,744 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 8902 states to 8902 states and 13667 transitions.
[2020-10-14 19:36:41,745 INFO  L78                 Accepts]: Start accepts. Automaton has 8902 states and 13667 transitions. Word has length 1676
[2020-10-14 19:36:41,747 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-14 19:36:41,747 INFO  L479      AbstractCegarLoop]: Abstraction has 8902 states and 13667 transitions.
[2020-10-14 19:36:41,747 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 23 states.
[2020-10-14 19:36:41,748 INFO  L276                IsEmpty]: Start isEmpty. Operand 8902 states and 13667 transitions.
[2020-10-14 19:36:41,801 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1700
[2020-10-14 19:36:41,801 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-14 19:36:41,802 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-10-14 19:36:41,803 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-10-14 19:36:41,807 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-14 19:36:41,807 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-14 19:36:41,808 INFO  L82        PathProgramCache]: Analyzing trace with hash -902136797, now seen corresponding path program 1 times
[2020-10-14 19:36:41,808 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-14 19:36:41,809 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1874088238]
[2020-10-14 19:36:41,809 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-14 19:36:41,961 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-14 19:36:41,990 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 19:36:42,060 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 19:36:42,865 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 19:36:46,965 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-14 19:36:46,965 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 1725
[2020-10-14 19:36:46,966 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 3
[2020-10-14 19:36:46,966 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5001
[2020-10-14 19:36:46,966 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-10-14 19:36:46,966 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.2
[2020-10-14 19:36:46,967 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 6
[2020-10-14 19:36:46,967 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 5
[2020-10-14 19:36:46,967 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 30
[2020-10-14 19:36:46,967 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-10-14 19:36:47,252 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-14 19:36:47,256 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-14 19:36:47,257 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 19:36:47,260 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-14 19:36:47,261 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-14 19:36:47,261 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-14 19:36:47,261 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 4
[2020-10-14 19:36:47,261 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-10-14 19:36:47,262 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.2
[2020-10-14 19:36:47,262 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-14 19:36:47,262 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-14 19:36:47,262 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 2
[2020-10-14 19:36:47,263 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-10-14 19:36:47,294 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2020-10-14 19:36:47,299 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-14 19:36:47,303 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 19:36:47,326 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-14 19:36:47,327 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 27
[2020-10-14 19:36:47,327 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-14 19:36:47,327 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 26
[2020-10-14 19:36:47,327 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-10-14 19:36:47,327 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.2
[2020-10-14 19:36:47,327 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-10-14 19:36:47,327 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 0
[2020-10-14 19:36:47,328 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 27
[2020-10-14 19:36:47,328 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-14 19:36:47,346 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34
[2020-10-14 19:36:47,348 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-14 19:36:47,350 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 19:36:47,353 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-14 19:36:47,353 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 10
[2020-10-14 19:36:47,353 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-14 19:36:47,353 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 3
[2020-10-14 19:36:47,353 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-10-14 19:36:47,354 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.2
[2020-10-14 19:36:47,354 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-10-14 19:36:47,354 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 7
[2020-10-14 19:36:47,354 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-10-14 19:36:47,355 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-10-14 19:36:48,372 INFO  L134       CoverageAnalysis]: Checked inductivity of 36 backedges. 27 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked.
[2020-10-14 19:36:48,373 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1874088238]
[2020-10-14 19:36:48,373 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-10-14 19:36:48,373 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7
[2020-10-14 19:36:48,374 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381990510]
[2020-10-14 19:36:48,376 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-10-14 19:36:48,376 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-14 19:36:48,376 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-10-14 19:36:48,376 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42
[2020-10-14 19:36:48,377 INFO  L87              Difference]: Start difference. First operand 8902 states and 13667 transitions. Second operand 7 states.
[2020-10-14 19:37:14,457 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-14 19:37:14,458 INFO  L93              Difference]: Finished difference Result 25395 states and 40563 transitions.
[2020-10-14 19:37:14,459 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2020-10-14 19:37:14,459 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 1699
[2020-10-14 19:37:14,460 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-14 19:37:14,515 INFO  L225             Difference]: With dead ends: 25395
[2020-10-14 19:37:14,515 INFO  L226             Difference]: Without dead ends: 16499
[2020-10-14 19:37:14,539 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132
[2020-10-14 19:37:14,558 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 16499 states.
[2020-10-14 19:37:14,875 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 16499 to 16258.
[2020-10-14 19:37:14,876 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 16258 states.
[2020-10-14 19:37:14,913 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 16258 states to 16258 states and 23286 transitions.
[2020-10-14 19:37:14,913 INFO  L78                 Accepts]: Start accepts. Automaton has 16258 states and 23286 transitions. Word has length 1699
[2020-10-14 19:37:14,914 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-14 19:37:14,914 INFO  L479      AbstractCegarLoop]: Abstraction has 16258 states and 23286 transitions.
[2020-10-14 19:37:14,914 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-10-14 19:37:14,914 INFO  L276                IsEmpty]: Start isEmpty. Operand 16258 states and 23286 transitions.
[2020-10-14 19:37:15,009 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1705
[2020-10-14 19:37:15,009 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-14 19:37:15,011 INFO  L422         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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-10-14 19:37:15,011 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-10-14 19:37:15,011 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-14 19:37:15,011 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-14 19:37:15,012 INFO  L82        PathProgramCache]: Analyzing trace with hash 705984568, now seen corresponding path program 1 times
[2020-10-14 19:37:15,012 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-14 19:37:15,014 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451918972]
[2020-10-14 19:37:15,014 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-14 19:37:15,139 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-14 19:37:15,180 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 19:37:15,510 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 19:37:20,144 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-14 19:37:20,145 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 1728
[2020-10-14 19:37:20,145 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-10-14 19:37:20,145 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5002
[2020-10-14 19:37:20,145 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-10-14 19:37:20,145 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.2
[2020-10-14 19:37:20,146 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 32
[2020-10-14 19:37:20,146 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 50
[2020-10-14 19:37:20,146 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1231
[2020-10-14 19:37:20,146 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-14 19:37:22,287 WARN  L193               SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34
[2020-10-14 19:37:22,402 WARN  L193               SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34
[2020-10-14 19:37:22,516 WARN  L193               SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34
[2020-10-14 19:37:22,644 WARN  L193               SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34
[2020-10-14 19:37:22,764 WARN  L193               SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34
[2020-10-14 19:37:23,026 WARN  L193               SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40
[2020-10-14 19:37:24,035 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-14 19:37:24,036 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-14 19:37:24,038 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 19:37:24,040 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-14 19:37:24,040 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-14 19:37:24,040 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-14 19:37:24,040 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 2
[2020-10-14 19:37:24,041 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-10-14 19:37:24,041 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.2
[2020-10-14 19:37:24,041 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-10-14 19:37:24,041 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-14 19:37:24,041 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-10-14 19:37:24,041 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-14 19:37:24,088 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2020-10-14 19:37:24,096 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-14 19:37:24,101 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 19:37:24,123 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-14 19:37:24,123 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 41
[2020-10-14 19:37:24,123 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-14 19:37:24,123 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 26
[2020-10-14 19:37:24,123 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-10-14 19:37:24,123 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.2
[2020-10-14 19:37:24,124 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-14 19:37:24,124 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-14 19:37:24,124 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 35
[2020-10-14 19:37:24,124 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-14 19:37:40,298 INFO  L134       CoverageAnalysis]: Checked inductivity of 37 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-14 19:37:40,298 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1451918972]
[2020-10-14 19:37:40,299 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-10-14 19:37:40,299 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24
[2020-10-14 19:37:40,299 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500700944]
[2020-10-14 19:37:40,300 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 24 states
[2020-10-14 19:37:40,300 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-14 19:37:40,301 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants.
[2020-10-14 19:37:40,301 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552
[2020-10-14 19:37:40,301 INFO  L87              Difference]: Start difference. First operand 16258 states and 23286 transitions. Second operand 24 states.
[2020-10-14 19:37:41,242 WARN  L193               SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68
[2020-10-14 19:37:41,493 WARN  L193               SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76