/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 interpolation-heuristic=FIRST --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/s4iff.c
--------------------------------------------------------------------------------
This is Ultimate 0.1.25-c90d42b
[2020-09-24 16:09:55,421 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2020-09-24 16:09:55,425 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2020-09-24 16:09:55,464 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-09-24 16:09:55,464 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-09-24 16:09:55,473 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-09-24 16:09:55,476 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-09-24 16:09:55,480 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2020-09-24 16:09:55,483 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-09-24 16:09:55,487 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-09-24 16:09:55,488 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2020-09-24 16:09:55,489 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-09-24 16:09:55,489 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-09-24 16:09:55,492 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-09-24 16:09:55,495 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-09-24 16:09:55,497 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-09-24 16:09:55,499 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-09-24 16:09:55,500 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-09-24 16:09:55,502 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-09-24 16:09:55,511 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2020-09-24 16:09:55,514 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-09-24 16:09:55,515 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-09-24 16:09:55,516 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2020-09-24 16:09:55,517 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-09-24 16:09:55,530 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-09-24 16:09:55,530 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-09-24 16:09:55,531 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-09-24 16:09:55,537 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-09-24 16:09:55,538 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-09-24 16:09:55,539 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-09-24 16:09:55,539 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-09-24 16:09:55,545 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-09-24 16:09:55,546 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-09-24 16:09:55,547 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values
[2020-09-24 16:09:55,548 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-09-24 16:09:55,548 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values
[2020-09-24 16:09:55,549 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-09-24 16:09:55,550 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-09-24 16:09:55,550 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
[2020-09-24 16:09:55,551 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values
[2020-09-24 16:09:55,553 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2020-09-24 16:09:55,554 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
[2020-09-24 16:09:55,603 INFO L113 SettingsManager]: Loading preferences was successful
[2020-09-24 16:09:55,603 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2020-09-24 16:09:55,606 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-09-24 16:09:55,606 INFO L138 SettingsManager]: * Create parallel compositions if possible=false
[2020-09-24 16:09:55,606 INFO L138 SettingsManager]: * Use SBE=true
[2020-09-24 16:09:55,606 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-09-24 16:09:55,607 INFO L138 SettingsManager]: * sizeof long=4
[2020-09-24 16:09:55,607 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2020-09-24 16:09:55,607 INFO L138 SettingsManager]: * sizeof POINTER=4
[2020-09-24 16:09:55,607 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2020-09-24 16:09:55,608 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2020-09-24 16:09:55,609 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-09-24 16:09:55,609 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2020-09-24 16:09:55,609 INFO L138 SettingsManager]: * sizeof long double=12
[2020-09-24 16:09:55,609 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2020-09-24 16:09:55,610 INFO L138 SettingsManager]: * Use constant arrays=true
[2020-09-24 16:09:55,610 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2020-09-24 16:09:55,610 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-09-24 16:09:55,610 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2020-09-24 16:09:55,611 INFO L138 SettingsManager]: * To the following directory=./dump/
[2020-09-24 16:09:55,611 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2020-09-24 16:09:55,611 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-24 16:09:55,611 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-09-24 16:09:55,611 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2020-09-24 16:09:55,612 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-09-24 16:09:55,612 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL
[2020-09-24 16:09:55,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-09-24 16:09:55,612 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-09-24 16:09:55,612 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE
[2020-09-24 16:09:55,613 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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;log-additional-information=true;
[2020-09-24 16:09:56,080 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2020-09-24 16:09:56,098 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-09-24 16:09:56,102 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-09-24 16:09:56,103 INFO L271 PluginConnector]: Initializing CDTParser...
[2020-09-24 16:09:56,104 INFO L275 PluginConnector]: CDTParser initialized
[2020-09-24 16:09:56,105 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s4iff.c
[2020-09-24 16:09:56,195 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/58677c8d4/006dd5cf38c1442fbe0038faa7282d06/FLAG7ee66c8bc
[2020-09-24 16:09:56,744 INFO L306 CDTParser]: Found 1 translation units.
[2020-09-24 16:09:56,744 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/s4iff.c
[2020-09-24 16:09:56,753 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/58677c8d4/006dd5cf38c1442fbe0038faa7282d06/FLAG7ee66c8bc
[2020-09-24 16:09:57,086 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/58677c8d4/006dd5cf38c1442fbe0038faa7282d06
[2020-09-24 16:09:57,099 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-09-24 16:09:57,106 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2020-09-24 16:09:57,107 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-09-24 16:09:57,107 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-09-24 16:09:57,112 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2020-09-24 16:09:57,113 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 04:09:57" (1/1) ...
[2020-09-24 16:09:57,119 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31a2ded and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:09:57, skipping insertion in model container
[2020-09-24 16:09:57,119 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 04:09:57" (1/1) ...
[2020-09-24 16:09:57,128 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2020-09-24 16:09:57,153 INFO L178 MainTranslator]: Built tables and reachable declarations
[2020-09-24 16:09:57,377 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-09-24 16:09:57,388 INFO L203 MainTranslator]: Completed pre-run
[2020-09-24 16:09:57,411 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-09-24 16:09:57,432 INFO L208 MainTranslator]: Completed translation
[2020-09-24 16:09:57,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:09:57 WrapperNode
[2020-09-24 16:09:57,433 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-09-24 16:09:57,434 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-09-24 16:09:57,434 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2020-09-24 16:09:57,434 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2020-09-24 16:09:57,535 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:09:57" (1/1) ...
[2020-09-24 16:09:57,536 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:09:57" (1/1) ...
[2020-09-24 16:09:57,545 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:09:57" (1/1) ...
[2020-09-24 16:09:57,546 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:09:57" (1/1) ...
[2020-09-24 16:09:57,556 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:09:57" (1/1) ...
[2020-09-24 16:09:57,564 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:09:57" (1/1) ...
[2020-09-24 16:09:57,568 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:09:57" (1/1) ...
[2020-09-24 16:09:57,574 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-09-24 16:09:57,575 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-09-24 16:09:57,575 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2020-09-24 16:09:57,575 INFO L275 PluginConnector]: RCFGBuilder initialized
[2020-09-24 16:09:57,578 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:09:57" (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
[2020-09-24 16:09:57,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-09-24 16:09:57,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-09-24 16:09:57,654 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2020-09-24 16:09:57,654 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2020-09-24 16:09:57,654 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2020-09-24 16:09:57,654 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-09-24 16:09:57,655 INFO L130 BoogieDeclarations]: Found specification of procedure abort
[2020-09-24 16:09:57,655 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2020-09-24 16:09:57,655 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2020-09-24 16:09:57,655 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-09-24 16:09:57,655 INFO L130 BoogieDeclarations]: Found specification of procedure malloc
[2020-09-24 16:09:57,656 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2020-09-24 16:09:57,656 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2020-09-24 16:09:57,656 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap
[2020-09-24 16:09:57,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~int
[2020-09-24 16:09:57,656 INFO L130 BoogieDeclarations]: Found specification of procedure read~int
[2020-09-24 16:09:57,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2020-09-24 16:09:57,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-09-24 16:09:57,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-09-24 16:09:58,028 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-09-24 16:09:58,029 INFO L295 CfgBuilder]: Removed 2 assume(true) statements.
[2020-09-24 16:09:58,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 04:09:58 BoogieIcfgContainer
[2020-09-24 16:09:58,034 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-09-24 16:09:58,036 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-09-24 16:09:58,036 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2020-09-24 16:09:58,039 INFO L275 PluginConnector]: TraceAbstraction initialized
[2020-09-24 16:09:58,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 04:09:57" (1/3) ...
[2020-09-24 16:09:58,041 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f8ea414 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 04:09:58, skipping insertion in model container
[2020-09-24 16:09:58,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:09:57" (2/3) ...
[2020-09-24 16:09:58,042 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f8ea414 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 04:09:58, skipping insertion in model container
[2020-09-24 16:09:58,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 04:09:58" (3/3) ...
[2020-09-24 16:09:58,044 INFO L109 eAbstractionObserver]: Analyzing ICFG s4iff.c
[2020-09-24 16:09:58,054 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-09-24 16:09:58,063 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-09-24 16:09:58,084 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-09-24 16:09:58,116 INFO L375 AbstractCegarLoop]: Interprodecural is true
[2020-09-24 16:09:58,116 INFO L376 AbstractCegarLoop]: Hoare is true
[2020-09-24 16:09:58,116 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-09-24 16:09:58,117 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-09-24 16:09:58,117 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-09-24 16:09:58,117 INFO L380 AbstractCegarLoop]: Difference is false
[2020-09-24 16:09:58,117 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-09-24 16:09:58,117 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-09-24 16:09:58,140 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states.
[2020-09-24 16:09:58,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2020-09-24 16:09:58,148 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 16:09:58,149 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]
[2020-09-24 16:09:58,150 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 16:09:58,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 16:09:58,157 INFO L82 PathProgramCache]: Analyzing trace with hash 171473808, now seen corresponding path program 1 times
[2020-09-24 16:09:58,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 16:09:58,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2024994111]
[2020-09-24 16:09:58,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 16:09:58,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 16:09:58,326 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0
[2020-09-24 16:09:58,327 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0
[2020-09-24 16:09:58,327 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0
[2020-09-24 16:09:58,327 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 16:09:58,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42
[2020-09-24 16:09:58,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 16:09:58,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10
[2020-09-24 16:09:58,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST
[2020-09-24 16:09:58,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 16:09:58,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32
[2020-09-24 16:09:58,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 16:09:58,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 16:09:58,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 16:09:58,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 16:09:58,426 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0
[2020-09-24 16:09:58,426 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0
[2020-09-24 16:09:58,427 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0
[2020-09-24 16:09:58,427 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 16:09:58,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12
[2020-09-24 16:09:58,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 16:09:58,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2
[2020-09-24 16:09:58,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST
[2020-09-24 16:09:58,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 16:09:58,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 16:09:58,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 16:09:58,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 16:09:58,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12
[2020-09-24 16:09:58,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 16:09:58,442 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0
[2020-09-24 16:09:58,443 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0
[2020-09-24 16:09:58,443 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0
[2020-09-24 16:09:58,443 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 16:09:58,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10
[2020-09-24 16:09:58,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 16:09:58,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2
[2020-09-24 16:09:58,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST
[2020-09-24 16:09:58,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 16:09:58,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 16:09:58,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 16:09:58,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 16:09:58,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 16:09:58,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2024994111]
[2020-09-24 16:09:58,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 16:09:58,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-09-24 16:09:58,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631949353]
[2020-09-24 16:09:58,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-09-24 16:09:58,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 16:09:58,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-09-24 16:09:58,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-09-24 16:09:58,487 INFO L87 Difference]: Start difference. First operand 65 states. Second operand 3 states.
[2020-09-24 16:09:58,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 16:09:58,671 INFO L93 Difference]: Finished difference Result 113 states and 126 transitions.
[2020-09-24 16:09:58,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2020-09-24 16:09:58,673 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31
[2020-09-24 16:09:58,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 16:09:58,685 INFO L225 Difference]: With dead ends: 113
[2020-09-24 16:09:58,685 INFO L226 Difference]: Without dead ends: 53
[2020-09-24 16:09:58,690 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
[2020-09-24 16:09:58,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states.
[2020-09-24 16:09:58,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53.
[2020-09-24 16:09:58,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states.
[2020-09-24 16:09:58,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions.
[2020-09-24 16:09:58,742 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 31
[2020-09-24 16:09:58,742 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 16:09:58,742 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions.
[2020-09-24 16:09:58,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-09-24 16:09:58,743 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions.
[2020-09-24 16:09:58,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2020-09-24 16:09:58,744 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 16:09:58,745 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]
[2020-09-24 16:09:58,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-09-24 16:09:58,745 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 16:09:58,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 16:09:58,746 INFO L82 PathProgramCache]: Analyzing trace with hash 921692051, now seen corresponding path program 1 times
[2020-09-24 16:09:58,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 16:09:58,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1330622933]
[2020-09-24 16:09:58,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 16:09:58,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 16:09:58,791 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0
[2020-09-24 16:09:58,792 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0
[2020-09-24 16:09:58,792 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0
[2020-09-24 16:09:58,792 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 16:09:58,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42
[2020-09-24 16:09:58,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 16:09:58,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10
[2020-09-24 16:09:58,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST
[2020-09-24 16:09:58,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3
[2020-09-24 16:09:58,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18
[2020-09-24 16:09:58,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15
[2020-09-24 16:09:58,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 16:09:58,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 16:09:58,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 16:09:58,880 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0
[2020-09-24 16:09:58,881 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0
[2020-09-24 16:09:58,881 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0
[2020-09-24 16:09:58,881 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 16:09:58,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12
[2020-09-24 16:09:58,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 16:09:58,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1
[2020-09-24 16:09:58,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST
[2020-09-24 16:09:58,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 16:09:58,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 16:09:58,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 16:09:58,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 16:09:58,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12
[2020-09-24 16:09:58,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 16:09:58,897 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0
[2020-09-24 16:09:58,897 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0
[2020-09-24 16:09:58,897 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0
[2020-09-24 16:09:58,898 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 16:09:58,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10
[2020-09-24 16:09:58,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 16:09:58,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3
[2020-09-24 16:09:58,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST
[2020-09-24 16:09:58,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-24 16:09:58,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 16:09:58,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6
[2020-09-24 16:09:58,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 16:09:58,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 16:09:58,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1330622933]
[2020-09-24 16:09:58,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 16:09:58,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-09-24 16:09:58,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601543981]
[2020-09-24 16:09:58,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-09-24 16:09:58,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 16:09:58,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-09-24 16:09:58,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-09-24 16:09:58,913 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 5 states.
[2020-09-24 16:09:59,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 16:09:59,141 INFO L93 Difference]: Finished difference Result 80 states and 85 transitions.
[2020-09-24 16:09:59,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states.
[2020-09-24 16:09:59,142 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31
[2020-09-24 16:09:59,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 16:09:59,144 INFO L225 Difference]: With dead ends: 80
[2020-09-24 16:09:59,144 INFO L226 Difference]: Without dead ends: 55
[2020-09-24 16:09:59,145 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
[2020-09-24 16:09:59,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states.
[2020-09-24 16:09:59,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55.
[2020-09-24 16:09:59,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states.
[2020-09-24 16:09:59,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions.
[2020-09-24 16:09:59,156 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 31
[2020-09-24 16:09:59,157 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 16:09:59,157 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions.
[2020-09-24 16:09:59,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-09-24 16:09:59,157 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions.
[2020-09-24 16:09:59,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49
[2020-09-24 16:09:59,159 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 16:09:59,159 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]
[2020-09-24 16:09:59,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-09-24 16:09:59,160 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 16:09:59,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 16:09:59,160 INFO L82 PathProgramCache]: Analyzing trace with hash -827220298, now seen corresponding path program 1 times
[2020-09-24 16:09:59,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 16:09:59,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1582319607]
[2020-09-24 16:09:59,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 16:09:59,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 16:09:59,535 FATAL L256 erpolLogProxyWrapper]: Difference in size: 3
[2020-09-24 16:09:59,535 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0
[2020-09-24 16:09:59,536 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0
[2020-09-24 16:09:59,536 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 16:09:59,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59
[2020-09-24 16:09:59,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 16:09:59,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 309
[2020-09-24 16:09:59,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST
[2020-09-24 16:09:59,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19
[2020-09-24 16:09:59,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18
[2020-09-24 16:09:59,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40
[2020-09-24 16:09:59,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 16:10:00,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 16:10:00,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 16:10:00,003 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0
[2020-09-24 16:10:00,004 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0
[2020-09-24 16:10:00,004 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0
[2020-09-24 16:10:00,005 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 16:10:00,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12
[2020-09-24 16:10:00,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 16:10:00,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1
[2020-09-24 16:10:00,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST
[2020-09-24 16:10:00,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 16:10:00,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 16:10:00,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 16:10:00,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 16:10:00,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12
[2020-09-24 16:10:00,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 16:10:00,015 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0
[2020-09-24 16:10:00,016 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0
[2020-09-24 16:10:00,016 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0
[2020-09-24 16:10:00,016 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 16:10:00,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10
[2020-09-24 16:10:00,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 16:10:00,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2
[2020-09-24 16:10:00,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST
[2020-09-24 16:10:00,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-24 16:10:00,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 16:10:00,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6
[2020-09-24 16:10:00,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 16:10:00,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 16:10:00,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1582319607]
[2020-09-24 16:10:00,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 16:10:00,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21
[2020-09-24 16:10:00,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009039422]
[2020-09-24 16:10:00,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states
[2020-09-24 16:10:00,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 16:10:00,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants.
[2020-09-24 16:10:00,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420
[2020-09-24 16:10:00,037 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 21 states.
[2020-09-24 16:10:01,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 16:10:01,394 INFO L93 Difference]: Finished difference Result 107 states and 113 transitions.
[2020-09-24 16:10:01,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states.
[2020-09-24 16:10:01,395 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 48
[2020-09-24 16:10:01,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 16:10:01,400 INFO L225 Difference]: With dead ends: 107
[2020-09-24 16:10:01,400 INFO L226 Difference]: Without dead ends: 101
[2020-09-24 16:10:01,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=316, Invalid=1324, Unknown=0, NotChecked=0, Total=1640
[2020-09-24 16:10:01,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states.
[2020-09-24 16:10:01,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 73.
[2020-09-24 16:10:01,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states.
[2020-09-24 16:10:01,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions.
[2020-09-24 16:10:01,422 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 48
[2020-09-24 16:10:01,423 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 16:10:01,423 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions.
[2020-09-24 16:10:01,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states.
[2020-09-24 16:10:01,423 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions.
[2020-09-24 16:10:01,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49
[2020-09-24 16:10:01,425 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 16:10:01,425 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]
[2020-09-24 16:10:01,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-09-24 16:10:01,426 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 16:10:01,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 16:10:01,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1272927570, now seen corresponding path program 1 times
[2020-09-24 16:10:01,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 16:10:01,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1839743158]
[2020-09-24 16:10:01,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 16:10:01,446 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2020-09-24 16:10:01,447 WARN L168 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility
[2020-09-24 16:10:01,447 INFO L520 BasicCegarLoop]: Counterexample might be feasible
[2020-09-24 16:10:01,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-09-24 16:10:01,475 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually.
[2020-09-24 16:10:01,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 04:10:01 BoogieIcfgContainer
[2020-09-24 16:10:01,476 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-09-24 16:10:01,484 INFO L168 Benchmark]: Toolchain (without parser) took 4377.36 ms. Allocated memory was 147.3 MB in the beginning and 245.9 MB in the end (delta: 98.6 MB). Free memory was 102.2 MB in the beginning and 213.8 MB in the end (delta: -111.6 MB). There was no memory consumed. Max. memory is 7.1 GB.
[2020-09-24 16:10:01,485 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 147.3 MB. Free memory was 120.6 MB in the beginning and 120.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB.
[2020-09-24 16:10:01,486 INFO L168 Benchmark]: CACSL2BoogieTranslator took 326.56 ms. Allocated memory is still 147.3 MB. Free memory was 101.5 MB in the beginning and 91.3 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB.
[2020-09-24 16:10:01,487 INFO L168 Benchmark]: Boogie Preprocessor took 140.68 ms. Allocated memory was 147.3 MB in the beginning and 203.9 MB in the end (delta: 56.6 MB). Free memory was 91.3 MB in the beginning and 181.2 MB in the end (delta: -89.9 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB.
[2020-09-24 16:10:01,488 INFO L168 Benchmark]: RCFGBuilder took 459.92 ms. Allocated memory is still 203.9 MB. Free memory was 181.2 MB in the beginning and 162.3 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 7.1 GB.
[2020-09-24 16:10:01,489 INFO L168 Benchmark]: TraceAbstraction took 3440.72 ms. Allocated memory was 203.9 MB in the beginning and 245.9 MB in the end (delta: 41.9 MB). Free memory was 161.7 MB in the beginning and 213.8 MB in the end (delta: -52.1 MB). There was no memory consumed. Max. memory is 7.1 GB.
[2020-09-24 16:10:01,493 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.20 ms. Allocated memory is still 147.3 MB. Free memory was 120.6 MB in the beginning and 120.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB.
* CACSL2BoogieTranslator took 326.56 ms. Allocated memory is still 147.3 MB. Free memory was 101.5 MB in the beginning and 91.3 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB.
* Boogie Preprocessor took 140.68 ms. Allocated memory was 147.3 MB in the beginning and 203.9 MB in the end (delta: 56.6 MB). Free memory was 91.3 MB in the beginning and 181.2 MB in the end (delta: -89.9 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB.
* RCFGBuilder took 459.92 ms. Allocated memory is still 203.9 MB. Free memory was 181.2 MB in the beginning and 162.3 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 7.1 GB.
* TraceAbstraction took 3440.72 ms. Allocated memory was 203.9 MB in the beginning and 245.9 MB in the end (delta: 41.9 MB). Free memory was 161.7 MB in the beginning and 213.8 MB in the end (delta: -52.1 MB). There was no memory consumed. 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] = 4
[L30] i++
[L30] COND FALSE !(i<N)
[L35] i=0
[L35] COND TRUE i<N
[L37] EXPR a[i]
[L37] COND FALSE !(a[i] == 4)
[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] == 5*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: 3.3s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 148 SDtfs, 480 SDslu, 282 SDs, 0 SdLazy, 704 SolverSat, 68 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 62 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 1.1s 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, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 110 NumberOfCodeBlocks, 110 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 107 ConstructedInterpolants, 0 QuantifiedInterpolants, 23317 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...