/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.8 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/s2iff.c
--------------------------------------------------------------------------------
This is Ultimate 0.1.25-c90d42b
[2020-09-25 08:00:47,023 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2020-09-25 08:00:47,027 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2020-09-25 08:00:47,072 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-09-25 08:00:47,072 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-09-25 08:00:47,080 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-09-25 08:00:47,082 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-09-25 08:00:47,086 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2020-09-25 08:00:47,089 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-09-25 08:00:47,092 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-09-25 08:00:47,093 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2020-09-25 08:00:47,094 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-09-25 08:00:47,094 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-09-25 08:00:47,097 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-09-25 08:00:47,100 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-09-25 08:00:47,102 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-09-25 08:00:47,103 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-09-25 08:00:47,104 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-09-25 08:00:47,106 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-09-25 08:00:47,115 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2020-09-25 08:00:47,117 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-09-25 08:00:47,119 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-09-25 08:00:47,120 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2020-09-25 08:00:47,121 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-09-25 08:00:47,140 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-09-25 08:00:47,141 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-09-25 08:00:47,141 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-09-25 08:00:47,142 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-09-25 08:00:47,143 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-09-25 08:00:47,144 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-09-25 08:00:47,144 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-09-25 08:00:47,147 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-09-25 08:00:47,148 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-09-25 08:00:47,150 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values
[2020-09-25 08:00:47,151 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-09-25 08:00:47,151 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values
[2020-09-25 08:00:47,152 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-09-25 08:00:47,152 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-09-25 08:00:47,153 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
[2020-09-25 08:00:47,154 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values
[2020-09-25 08:00:47,155 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2020-09-25 08:00:47,156 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 08:00:47,198 INFO L113 SettingsManager]: Loading preferences was successful
[2020-09-25 08:00:47,198 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2020-09-25 08:00:47,200 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-09-25 08:00:47,201 INFO L138 SettingsManager]: * Create parallel compositions if possible=false
[2020-09-25 08:00:47,201 INFO L138 SettingsManager]: * Use SBE=true
[2020-09-25 08:00:47,202 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-09-25 08:00:47,202 INFO L138 SettingsManager]: * sizeof long=4
[2020-09-25 08:00:47,202 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2020-09-25 08:00:47,202 INFO L138 SettingsManager]: * sizeof POINTER=4
[2020-09-25 08:00:47,203 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2020-09-25 08:00:47,204 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2020-09-25 08:00:47,204 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-09-25 08:00:47,204 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2020-09-25 08:00:47,205 INFO L138 SettingsManager]: * sizeof long double=12
[2020-09-25 08:00:47,205 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2020-09-25 08:00:47,205 INFO L138 SettingsManager]: * Use constant arrays=true
[2020-09-25 08:00:47,205 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2020-09-25 08:00:47,205 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-09-25 08:00:47,206 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2020-09-25 08:00:47,207 INFO L138 SettingsManager]: * To the following directory=./dump/
[2020-09-25 08:00:47,208 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2020-09-25 08:00:47,209 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-25 08:00:47,210 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-09-25 08:00:47,211 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2020-09-25 08:00:47,211 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-09-25 08:00:47,212 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL
[2020-09-25 08:00:47,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-09-25 08:00:47,212 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-09-25 08:00:47,212 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE
[2020-09-25 08:00:47,212 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=WIDESTAMONGSMALL;tolerance=0.8;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=WIDESTAMONGSMALL;tolerance=0.8;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=WIDESTAMONGSMALL;tolerance=0.8;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=WIDESTAMONGSMALL;tolerance=0.8;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=WIDESTAMONGSMALL;tolerance=0.8;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=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true;
[2020-09-25 08:00:47,677 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2020-09-25 08:00:47,702 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-09-25 08:00:47,707 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-09-25 08:00:47,710 INFO L271 PluginConnector]: Initializing CDTParser...
[2020-09-25 08:00:47,710 INFO L275 PluginConnector]: CDTParser initialized
[2020-09-25 08:00:47,711 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s2iff.c
[2020-09-25 08:00:47,808 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cc97c3841/ffc43cbd57e3486b91a313dd0ab063f8/FLAG8ab2f71e6
[2020-09-25 08:00:48,351 INFO L306 CDTParser]: Found 1 translation units.
[2020-09-25 08:00:48,352 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/s2iff.c
[2020-09-25 08:00:48,360 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cc97c3841/ffc43cbd57e3486b91a313dd0ab063f8/FLAG8ab2f71e6
[2020-09-25 08:00:48,680 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cc97c3841/ffc43cbd57e3486b91a313dd0ab063f8
[2020-09-25 08:00:48,695 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-09-25 08:00:48,701 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2020-09-25 08:00:48,702 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-09-25 08:00:48,704 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-09-25 08:00:48,708 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2020-09-25 08:00:48,709 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 08:00:48" (1/1) ...
[2020-09-25 08:00:48,714 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@434f45a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:00:48, skipping insertion in model container
[2020-09-25 08:00:48,714 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 08:00:48" (1/1) ...
[2020-09-25 08:00:48,724 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2020-09-25 08:00:48,755 INFO L178 MainTranslator]: Built tables and reachable declarations
[2020-09-25 08:00:49,008 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-09-25 08:00:49,018 INFO L203 MainTranslator]: Completed pre-run
[2020-09-25 08:00:49,040 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-09-25 08:00:49,057 INFO L208 MainTranslator]: Completed translation
[2020-09-25 08:00:49,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:00:49 WrapperNode
[2020-09-25 08:00:49,058 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-09-25 08:00:49,059 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-09-25 08:00:49,059 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2020-09-25 08:00:49,059 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2020-09-25 08:00:49,146 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:00:49" (1/1) ...
[2020-09-25 08:00:49,147 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:00:49" (1/1) ...
[2020-09-25 08:00:49,157 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:00:49" (1/1) ...
[2020-09-25 08:00:49,158 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:00:49" (1/1) ...
[2020-09-25 08:00:49,166 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:00:49" (1/1) ...
[2020-09-25 08:00:49,173 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:00:49" (1/1) ...
[2020-09-25 08:00:49,175 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:00:49" (1/1) ...
[2020-09-25 08:00:49,178 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-09-25 08:00:49,178 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-09-25 08:00:49,179 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2020-09-25 08:00:49,179 INFO L275 PluginConnector]: RCFGBuilder initialized
[2020-09-25 08:00:49,180 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:00:49" (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 08:00:49,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-09-25 08:00:49,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-09-25 08:00:49,257 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2020-09-25 08:00:49,257 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2020-09-25 08:00:49,257 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2020-09-25 08:00:49,257 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-09-25 08:00:49,257 INFO L130 BoogieDeclarations]: Found specification of procedure abort
[2020-09-25 08:00:49,258 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2020-09-25 08:00:49,258 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2020-09-25 08:00:49,258 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-09-25 08:00:49,258 INFO L130 BoogieDeclarations]: Found specification of procedure malloc
[2020-09-25 08:00:49,259 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2020-09-25 08:00:49,259 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2020-09-25 08:00:49,259 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap
[2020-09-25 08:00:49,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~int
[2020-09-25 08:00:49,259 INFO L130 BoogieDeclarations]: Found specification of procedure read~int
[2020-09-25 08:00:49,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2020-09-25 08:00:49,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-09-25 08:00:49,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-09-25 08:00:49,616 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-09-25 08:00:49,617 INFO L295 CfgBuilder]: Removed 2 assume(true) statements.
[2020-09-25 08:00:49,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 08:00:49 BoogieIcfgContainer
[2020-09-25 08:00:49,622 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-09-25 08:00:49,623 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-09-25 08:00:49,623 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2020-09-25 08:00:49,627 INFO L275 PluginConnector]: TraceAbstraction initialized
[2020-09-25 08:00:49,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 08:00:48" (1/3) ...
[2020-09-25 08:00:49,628 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c8379b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 08:00:49, skipping insertion in model container
[2020-09-25 08:00:49,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:00:49" (2/3) ...
[2020-09-25 08:00:49,629 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c8379b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 08:00:49, skipping insertion in model container
[2020-09-25 08:00:49,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 08:00:49" (3/3) ...
[2020-09-25 08:00:49,631 INFO L109 eAbstractionObserver]: Analyzing ICFG s2iff.c
[2020-09-25 08:00:49,644 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-09-25 08:00:49,653 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-09-25 08:00:49,672 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-09-25 08:00:49,698 INFO L375 AbstractCegarLoop]: Interprodecural is true
[2020-09-25 08:00:49,699 INFO L376 AbstractCegarLoop]: Hoare is true
[2020-09-25 08:00:49,699 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-09-25 08:00:49,699 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-09-25 08:00:49,699 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-09-25 08:00:49,699 INFO L380 AbstractCegarLoop]: Difference is false
[2020-09-25 08:00:49,699 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-09-25 08:00:49,700 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-09-25 08:00:49,722 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states.
[2020-09-25 08:00:49,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2020-09-25 08:00:49,731 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-25 08:00:49,732 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]
[2020-09-25 08:00:49,732 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 08:00:49,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 08:00:49,739 INFO L82 PathProgramCache]: Analyzing trace with hash 171473808, now seen corresponding path program 1 times
[2020-09-25 08:00:49,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 08:00:49,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [25530636]
[2020-09-25 08:00:49,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 08:00:49,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 08:00:49,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:00:49,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:00:50,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 08:00:50,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42
[2020-09-25 08:00:50,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-25 08:00:50,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 239
[2020-09-25 08:00:50,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-09-25 08:00:50,140 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8
[2020-09-25 08:00:50,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 08:00:50,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34
[2020-09-25 08:00:50,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 08:00:50,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4
[2020-09-25 08:00:50,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 08:00:50,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 08:00:50,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:00:50,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 08:00:50,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12
[2020-09-25 08:00:50,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 08:00:50,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17
[2020-09-25 08:00:50,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-09-25 08:00:50,266 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8
[2020-09-25 08:00:50,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 08:00:50,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 08:00:50,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 08:00:50,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 08:00:50,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12
[2020-09-25 08:00:50,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 08:00:50,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:00:50,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 08:00:50,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10
[2020-09-25 08:00:50,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 08:00:50,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10
[2020-09-25 08:00:50,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-09-25 08:00:50,289 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8
[2020-09-25 08:00:50,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 08:00:50,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 08:00:50,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 08:00:50,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 08:00:50,302 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 08:00:50,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [25530636]
[2020-09-25 08:00:50,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-25 08:00:50,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-09-25 08:00:50,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346742619]
[2020-09-25 08:00:50,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-09-25 08:00:50,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 08:00:50,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-09-25 08:00:50,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-09-25 08:00:50,337 INFO L87 Difference]: Start difference. First operand 65 states. Second operand 3 states.
[2020-09-25 08:00:50,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 08:00:50,543 INFO L93 Difference]: Finished difference Result 113 states and 126 transitions.
[2020-09-25 08:00:50,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2020-09-25 08:00:50,546 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31
[2020-09-25 08:00:50,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 08:00:50,560 INFO L225 Difference]: With dead ends: 113
[2020-09-25 08:00:50,560 INFO L226 Difference]: Without dead ends: 53
[2020-09-25 08:00:50,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-09-25 08:00:50,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states.
[2020-09-25 08:00:50,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53.
[2020-09-25 08:00:50,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states.
[2020-09-25 08:00:50,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions.
[2020-09-25 08:00:50,631 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 31
[2020-09-25 08:00:50,631 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-25 08:00:50,631 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions.
[2020-09-25 08:00:50,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-09-25 08:00:50,632 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions.
[2020-09-25 08:00:50,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2020-09-25 08:00:50,634 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-25 08:00:50,634 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]
[2020-09-25 08:00:50,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-09-25 08:00:50,635 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 08:00:50,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 08:00:50,635 INFO L82 PathProgramCache]: Analyzing trace with hash 921692051, now seen corresponding path program 1 times
[2020-09-25 08:00:50,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 08:00:50,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055102705]
[2020-09-25 08:00:50,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 08:00:50,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 08:00:50,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:00:50,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:00:51,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 08:00:51,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42
[2020-09-25 08:00:51,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-25 08:00:51,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 376
[2020-09-25 08:00:51,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-09-25 08:00:51,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8
[2020-09-25 08:00:51,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3
[2020-09-25 08:00:51,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18
[2020-09-25 08:00:51,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17
[2020-09-25 08:00:51,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 08:00:51,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 08:00:51,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 08:00:51,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:00:51,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 08:00:51,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12
[2020-09-25 08:00:51,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 08:00:51,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13
[2020-09-25 08:00:51,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-09-25 08:00:51,138 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8
[2020-09-25 08:00:51,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 08:00:51,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 08:00:51,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 08:00:51,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 08:00:51,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12
[2020-09-25 08:00:51,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 08:00:51,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:00:51,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 08:00:51,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10
[2020-09-25 08:00:51,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 08:00:51,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19
[2020-09-25 08:00:51,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-09-25 08:00:51,167 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8
[2020-09-25 08:00:51,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-25 08:00:51,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 08:00:51,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6
[2020-09-25 08:00:51,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 08:00:51,180 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 08:00:51,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055102705]
[2020-09-25 08:00:51,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-25 08:00:51,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-09-25 08:00:51,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871389361]
[2020-09-25 08:00:51,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-09-25 08:00:51,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 08:00:51,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-09-25 08:00:51,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-09-25 08:00:51,188 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 5 states.
[2020-09-25 08:00:51,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 08:00:51,401 INFO L93 Difference]: Finished difference Result 80 states and 85 transitions.
[2020-09-25 08:00:51,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states.
[2020-09-25 08:00:51,402 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31
[2020-09-25 08:00:51,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 08:00:51,403 INFO L225 Difference]: With dead ends: 80
[2020-09-25 08:00:51,404 INFO L226 Difference]: Without dead ends: 55
[2020-09-25 08:00:51,405 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42
[2020-09-25 08:00:51,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states.
[2020-09-25 08:00:51,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55.
[2020-09-25 08:00:51,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states.
[2020-09-25 08:00:51,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions.
[2020-09-25 08:00:51,422 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 31
[2020-09-25 08:00:51,422 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-25 08:00:51,423 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions.
[2020-09-25 08:00:51,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-09-25 08:00:51,423 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions.
[2020-09-25 08:00:51,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49
[2020-09-25 08:00:51,425 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-25 08:00:51,425 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]
[2020-09-25 08:00:51,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-09-25 08:00:51,425 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 08:00:51,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 08:00:51,426 INFO L82 PathProgramCache]: Analyzing trace with hash -827220298, now seen corresponding path program 1 times
[2020-09-25 08:00:51,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 08:00:51,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1902687861]
[2020-09-25 08:00:51,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 08:00:51,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 08:00:51,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:00:51,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:00:51,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:00:52,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:00:52,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:00:53,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:00:53,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:00:54,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:00:54,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:00:56,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:00:56,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 08:00:56,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59
[2020-09-25 08:00:56,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10
[2020-09-25 08:00:56,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010
[2020-09-25 08:00:56,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-09-25 08:00:56,470 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8
[2020-09-25 08:00:56,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18
[2020-09-25 08:00:56,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18
[2020-09-25 08:00:56,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40
[2020-09-25 08:00:56,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 08:00:57,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 08:00:57,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 08:00:57,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:00:57,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 08:00:57,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12
[2020-09-25 08:00:57,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 08:00:57,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6
[2020-09-25 08:00:57,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-09-25 08:00:57,270 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8
[2020-09-25 08:00:57,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 08:00:57,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 08:00:57,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 08:00:57,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 08:00:57,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12
[2020-09-25 08:00:57,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 08:00:57,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:00:57,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 08:00:57,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10
[2020-09-25 08:00:57,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 08:00:57,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7
[2020-09-25 08:00:57,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-09-25 08:00:57,286 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8
[2020-09-25 08:00:57,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-25 08:00:57,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 08:00:57,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6
[2020-09-25 08:00:57,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 08:00:57,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-25 08:00:57,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1902687861]
[2020-09-25 08:00:57,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-25 08:00:57,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20
[2020-09-25 08:00:57,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122357185]
[2020-09-25 08:00:57,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states
[2020-09-25 08:00:57,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 08:00:57,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants.
[2020-09-25 08:00:57,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380
[2020-09-25 08:00:57,306 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 20 states.
[2020-09-25 08:00:58,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 08:00:58,943 INFO L93 Difference]: Finished difference Result 107 states and 113 transitions.
[2020-09-25 08:00:58,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states.
[2020-09-25 08:00:58,944 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48
[2020-09-25 08:00:58,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 08:00:58,948 INFO L225 Difference]: With dead ends: 107
[2020-09-25 08:00:58,948 INFO L226 Difference]: Without dead ends: 101
[2020-09-25 08:00:58,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=283, Invalid=1199, Unknown=0, NotChecked=0, Total=1482
[2020-09-25 08:00:58,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states.
[2020-09-25 08:00:58,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 73.
[2020-09-25 08:00:58,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states.
[2020-09-25 08:00:58,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions.
[2020-09-25 08:00:58,962 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 48
[2020-09-25 08:00:58,963 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-25 08:00:58,963 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions.
[2020-09-25 08:00:58,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states.
[2020-09-25 08:00:58,963 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions.
[2020-09-25 08:00:58,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49
[2020-09-25 08:00:58,965 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-25 08:00:58,965 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]
[2020-09-25 08:00:58,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-09-25 08:00:58,965 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 08:00:58,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 08:00:58,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1272927570, now seen corresponding path program 1 times
[2020-09-25 08:00:58,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 08:00:58,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [66186899]
[2020-09-25 08:00:58,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 08:00:58,982 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2020-09-25 08:00:58,983 WARN L168 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility
[2020-09-25 08:00:58,983 INFO L520 BasicCegarLoop]: Counterexample might be feasible
[2020-09-25 08:00:58,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-09-25 08:00:59,012 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually.
[2020-09-25 08:00:59,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 08:00:59 BoogieIcfgContainer
[2020-09-25 08:00:59,013 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-09-25 08:00:59,017 INFO L168 Benchmark]: Toolchain (without parser) took 10318.36 ms. Allocated memory was 140.0 MB in the beginning and 308.8 MB in the end (delta: 168.8 MB). Free memory was 103.1 MB in the beginning and 218.4 MB in the end (delta: -115.3 MB). Peak memory consumption was 53.5 MB. Max. memory is 7.1 GB.
[2020-09-25 08:00:59,018 INFO L168 Benchmark]: CDTParser took 0.21 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: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB.
[2020-09-25 08:00:59,018 INFO L168 Benchmark]: CACSL2BoogieTranslator took 356.52 ms. Allocated memory is still 140.0 MB. Free memory was 102.4 MB in the beginning and 92.1 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB.
[2020-09-25 08:00:59,020 INFO L168 Benchmark]: Boogie Preprocessor took 119.02 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 92.1 MB in the beginning and 180.3 MB in the end (delta: -88.2 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB.
[2020-09-25 08:00:59,020 INFO L168 Benchmark]: RCFGBuilder took 443.72 ms. Allocated memory is still 202.4 MB. Free memory was 180.3 MB in the beginning and 160.5 MB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB.
[2020-09-25 08:00:59,021 INFO L168 Benchmark]: TraceAbstraction took 9389.68 ms. Allocated memory was 202.4 MB in the beginning and 308.8 MB in the end (delta: 106.4 MB). Free memory was 160.5 MB in the beginning and 218.4 MB in the end (delta: -57.8 MB). Peak memory consumption was 48.6 MB. Max. memory is 7.1 GB.
[2020-09-25 08:00:59,030 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.21 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: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB.
* CACSL2BoogieTranslator took 356.52 ms. Allocated memory is still 140.0 MB. Free memory was 102.4 MB in the beginning and 92.1 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB.
* Boogie Preprocessor took 119.02 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 92.1 MB in the beginning and 180.3 MB in the end (delta: -88.2 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB.
* RCFGBuilder took 443.72 ms. Allocated memory is still 202.4 MB. Free memory was 180.3 MB in the beginning and 160.5 MB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB.
* TraceAbstraction took 9389.68 ms. Allocated memory was 202.4 MB in the beginning and 308.8 MB in the end (delta: 106.4 MB). Free memory was 160.5 MB in the beginning and 218.4 MB in the end (delta: -57.8 MB). Peak memory consumption was 48.6 MB. Max. memory is 7.1 GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- UnprovableResult [Line: 13]: Unable to prove that call of __VERIFIER_error() unreachable
Unable to prove that call of __VERIFIER_error() unreachable
Reason: unable to decide satisfiability of path constraint.
Possible FailurePath:
[L17] int N;
[L21] N = __VERIFIER_nondet_int()
[L22] COND FALSE !(N <= 0)
[L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int))
[L11] COND FALSE !(!cond)
[L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int))
[L25] int i;
[L26] long long sum[1];
[L27] int *a = malloc(sizeof(int)*N);
[L29] sum[0] = 1
[L30] i=0
[L30] COND TRUE i<N
[L32] a[i] = 2
[L30] i++
[L30] COND FALSE !(i<N)
[L35] i=0
[L35] COND TRUE i<N
[L37] EXPR a[i]
[L37] COND FALSE !(a[i] == 2)
[L40] EXPR sum[0]
[L40] EXPR a[i]
[L40] sum[0] = sum[0] * a[i]
[L35] i++
[L35] COND FALSE !(i<N)
[L44] EXPR sum[0]
[L44] CALL __VERIFIER_assert(sum[0] == 3*N)
[L13] COND TRUE !(cond)
[L13] __VERIFIER_error()
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 5 procedures, 65 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 9.2s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 150 SDtfs, 493 SDslu, 267 SDs, 0 SdLazy, 664 SolverSat, 69 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 60 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=73occurred in iteration=3, 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, 3 MinimizatonAttempts, 28 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 6.7s InterpolantComputationTime, 110 NumberOfCodeBlocks, 110 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 107 ConstructedInterpolants, 0 QuantifiedInterpolants, 33025 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 0/2 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 could not prove your program: unable to determine feasibility of some traces
Received shutdown request...