/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=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-properties/list-2.i
--------------------------------------------------------------------------------
This is Ultimate 0.1.25-c90d42b
[2020-09-24 20:28:21,442 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2020-09-24 20:28:21,446 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2020-09-24 20:28:21,479 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-09-24 20:28:21,480 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-09-24 20:28:21,489 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-09-24 20:28:21,491 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-09-24 20:28:21,495 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2020-09-24 20:28:21,497 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-09-24 20:28:21,501 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-09-24 20:28:21,502 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2020-09-24 20:28:21,504 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-09-24 20:28:21,504 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-09-24 20:28:21,508 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-09-24 20:28:21,512 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-09-24 20:28:21,514 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-09-24 20:28:21,516 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-09-24 20:28:21,517 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-09-24 20:28:21,519 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-09-24 20:28:21,529 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2020-09-24 20:28:21,531 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-09-24 20:28:21,533 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-09-24 20:28:21,534 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2020-09-24 20:28:21,535 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-09-24 20:28:21,548 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-09-24 20:28:21,548 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-09-24 20:28:21,549 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-09-24 20:28:21,555 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-09-24 20:28:21,556 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-09-24 20:28:21,557 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-09-24 20:28:21,557 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-09-24 20:28:21,558 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-09-24 20:28:21,561 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-09-24 20:28:21,562 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values
[2020-09-24 20:28:21,563 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-09-24 20:28:21,563 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values
[2020-09-24 20:28:21,569 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-09-24 20:28:21,569 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-09-24 20:28:21,569 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
[2020-09-24 20:28:21,570 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values
[2020-09-24 20:28:21,572 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2020-09-24 20:28:21,573 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 20:28:21,620 INFO L113 SettingsManager]: Loading preferences was successful
[2020-09-24 20:28:21,620 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2020-09-24 20:28:21,623 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-09-24 20:28:21,623 INFO L138 SettingsManager]: * Create parallel compositions if possible=false
[2020-09-24 20:28:21,623 INFO L138 SettingsManager]: * Use SBE=true
[2020-09-24 20:28:21,624 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-09-24 20:28:21,624 INFO L138 SettingsManager]: * sizeof long=4
[2020-09-24 20:28:21,624 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2020-09-24 20:28:21,625 INFO L138 SettingsManager]: * sizeof POINTER=4
[2020-09-24 20:28:21,625 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2020-09-24 20:28:21,626 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2020-09-24 20:28:21,626 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-09-24 20:28:21,626 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2020-09-24 20:28:21,627 INFO L138 SettingsManager]: * sizeof long double=12
[2020-09-24 20:28:21,627 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2020-09-24 20:28:21,627 INFO L138 SettingsManager]: * Use constant arrays=true
[2020-09-24 20:28:21,627 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2020-09-24 20:28:21,628 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-09-24 20:28:21,628 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2020-09-24 20:28:21,628 INFO L138 SettingsManager]: * To the following directory=./dump/
[2020-09-24 20:28:21,629 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2020-09-24 20:28:21,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-24 20:28:21,629 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-09-24 20:28:21,629 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2020-09-24 20:28:21,629 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-09-24 20:28:21,630 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL
[2020-09-24 20:28:21,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-09-24 20:28:21,630 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-09-24 20:28:21,630 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE
[2020-09-24 20:28:21,630 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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;log-additional-information=true;
[2020-09-24 20:28:22,150 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2020-09-24 20:28:22,178 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-09-24 20:28:22,183 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-09-24 20:28:22,186 INFO L271 PluginConnector]: Initializing CDTParser...
[2020-09-24 20:28:22,186 INFO L275 PluginConnector]: CDTParser initialized
[2020-09-24 20:28:22,187 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list-2.i
[2020-09-24 20:28:22,283 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a839260d5/4ca136c3a88b49b68db9963db5daad6e/FLAGe1b1f68e7
[2020-09-24 20:28:22,902 INFO L306 CDTParser]: Found 1 translation units.
[2020-09-24 20:28:22,903 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/list-2.i
[2020-09-24 20:28:22,925 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a839260d5/4ca136c3a88b49b68db9963db5daad6e/FLAGe1b1f68e7
[2020-09-24 20:28:23,161 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a839260d5/4ca136c3a88b49b68db9963db5daad6e
[2020-09-24 20:28:23,174 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-09-24 20:28:23,180 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2020-09-24 20:28:23,182 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-09-24 20:28:23,182 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-09-24 20:28:23,186 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2020-09-24 20:28:23,187 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:28:23" (1/1) ...
[2020-09-24 20:28:23,192 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71bddb66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:28:23, skipping insertion in model container
[2020-09-24 20:28:23,192 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:28:23" (1/1) ...
[2020-09-24 20:28:23,202 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2020-09-24 20:28:23,254 INFO L178 MainTranslator]: Built tables and reachable declarations
[2020-09-24 20:28:23,768 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-09-24 20:28:23,788 INFO L203 MainTranslator]: Completed pre-run
[2020-09-24 20:28:23,867 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-09-24 20:28:23,921 INFO L208 MainTranslator]: Completed translation
[2020-09-24 20:28:23,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:28:23 WrapperNode
[2020-09-24 20:28:23,922 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-09-24 20:28:23,924 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-09-24 20:28:23,924 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2020-09-24 20:28:23,924 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2020-09-24 20:28:23,942 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:28:23" (1/1) ...
[2020-09-24 20:28:23,943 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:28:23" (1/1) ...
[2020-09-24 20:28:23,962 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:28:23" (1/1) ...
[2020-09-24 20:28:23,963 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:28:23" (1/1) ...
[2020-09-24 20:28:23,993 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:28:23" (1/1) ...
[2020-09-24 20:28:24,004 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:28:23" (1/1) ...
[2020-09-24 20:28:24,011 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:28:23" (1/1) ...
[2020-09-24 20:28:24,018 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-09-24 20:28:24,019 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-09-24 20:28:24,019 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2020-09-24 20:28:24,020 INFO L275 PluginConnector]: RCFGBuilder initialized
[2020-09-24 20:28:24,021 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:28:23" (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 20:28:24,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-09-24 20:28:24,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-09-24 20:28:24,094 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32
[2020-09-24 20:28:24,094 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64
[2020-09-24 20:28:24,095 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity
[2020-09-24 20:28:24,095 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity
[2020-09-24 20:28:24,095 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity
[2020-09-24 20:28:24,095 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit
[2020-09-24 20:28:24,095 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2020-09-24 20:28:24,096 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-09-24 20:28:24,096 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-09-24 20:28:24,096 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max
[2020-09-24 20:28:24,096 INFO L130 BoogieDeclarations]: Found specification of procedure atof
[2020-09-24 20:28:24,096 INFO L130 BoogieDeclarations]: Found specification of procedure atoi
[2020-09-24 20:28:24,097 INFO L130 BoogieDeclarations]: Found specification of procedure atol
[2020-09-24 20:28:24,098 INFO L130 BoogieDeclarations]: Found specification of procedure atoll
[2020-09-24 20:28:24,098 INFO L130 BoogieDeclarations]: Found specification of procedure strtod
[2020-09-24 20:28:24,098 INFO L130 BoogieDeclarations]: Found specification of procedure strtof
[2020-09-24 20:28:24,098 INFO L130 BoogieDeclarations]: Found specification of procedure strtold
[2020-09-24 20:28:24,098 INFO L130 BoogieDeclarations]: Found specification of procedure strtol
[2020-09-24 20:28:24,099 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul
[2020-09-24 20:28:24,099 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq
[2020-09-24 20:28:24,100 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq
[2020-09-24 20:28:24,100 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll
[2020-09-24 20:28:24,102 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull
[2020-09-24 20:28:24,102 INFO L130 BoogieDeclarations]: Found specification of procedure l64a
[2020-09-24 20:28:24,103 INFO L130 BoogieDeclarations]: Found specification of procedure a64l
[2020-09-24 20:28:24,103 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32
[2020-09-24 20:28:24,104 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64
[2020-09-24 20:28:24,104 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity
[2020-09-24 20:28:24,104 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity
[2020-09-24 20:28:24,104 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity
[2020-09-24 20:28:24,104 INFO L130 BoogieDeclarations]: Found specification of procedure select
[2020-09-24 20:28:24,105 INFO L130 BoogieDeclarations]: Found specification of procedure pselect
[2020-09-24 20:28:24,105 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major
[2020-09-24 20:28:24,105 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor
[2020-09-24 20:28:24,105 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev
[2020-09-24 20:28:24,105 INFO L130 BoogieDeclarations]: Found specification of procedure random
[2020-09-24 20:28:24,105 INFO L130 BoogieDeclarations]: Found specification of procedure srandom
[2020-09-24 20:28:24,105 INFO L130 BoogieDeclarations]: Found specification of procedure initstate
[2020-09-24 20:28:24,106 INFO L130 BoogieDeclarations]: Found specification of procedure setstate
[2020-09-24 20:28:24,106 INFO L130 BoogieDeclarations]: Found specification of procedure random_r
[2020-09-24 20:28:24,106 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r
[2020-09-24 20:28:24,106 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r
[2020-09-24 20:28:24,106 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r
[2020-09-24 20:28:24,106 INFO L130 BoogieDeclarations]: Found specification of procedure rand
[2020-09-24 20:28:24,107 INFO L130 BoogieDeclarations]: Found specification of procedure srand
[2020-09-24 20:28:24,107 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r
[2020-09-24 20:28:24,107 INFO L130 BoogieDeclarations]: Found specification of procedure drand48
[2020-09-24 20:28:24,107 INFO L130 BoogieDeclarations]: Found specification of procedure erand48
[2020-09-24 20:28:24,107 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48
[2020-09-24 20:28:24,107 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48
[2020-09-24 20:28:24,107 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48
[2020-09-24 20:28:24,108 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48
[2020-09-24 20:28:24,108 INFO L130 BoogieDeclarations]: Found specification of procedure srand48
[2020-09-24 20:28:24,108 INFO L130 BoogieDeclarations]: Found specification of procedure seed48
[2020-09-24 20:28:24,108 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48
[2020-09-24 20:28:24,108 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r
[2020-09-24 20:28:24,108 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r
[2020-09-24 20:28:24,108 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r
[2020-09-24 20:28:24,108 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r
[2020-09-24 20:28:24,109 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r
[2020-09-24 20:28:24,109 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r
[2020-09-24 20:28:24,109 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r
[2020-09-24 20:28:24,109 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r
[2020-09-24 20:28:24,110 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r
[2020-09-24 20:28:24,110 INFO L130 BoogieDeclarations]: Found specification of procedure malloc
[2020-09-24 20:28:24,111 INFO L130 BoogieDeclarations]: Found specification of procedure calloc
[2020-09-24 20:28:24,111 INFO L130 BoogieDeclarations]: Found specification of procedure realloc
[2020-09-24 20:28:24,111 INFO L130 BoogieDeclarations]: Found specification of procedure free
[2020-09-24 20:28:24,112 INFO L130 BoogieDeclarations]: Found specification of procedure alloca
[2020-09-24 20:28:24,113 INFO L130 BoogieDeclarations]: Found specification of procedure valloc
[2020-09-24 20:28:24,114 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign
[2020-09-24 20:28:24,114 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc
[2020-09-24 20:28:24,114 INFO L130 BoogieDeclarations]: Found specification of procedure abort
[2020-09-24 20:28:24,114 INFO L130 BoogieDeclarations]: Found specification of procedure atexit
[2020-09-24 20:28:24,114 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit
[2020-09-24 20:28:24,114 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit
[2020-09-24 20:28:24,115 INFO L130 BoogieDeclarations]: Found specification of procedure exit
[2020-09-24 20:28:24,115 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit
[2020-09-24 20:28:24,115 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit
[2020-09-24 20:28:24,115 INFO L130 BoogieDeclarations]: Found specification of procedure getenv
[2020-09-24 20:28:24,116 INFO L130 BoogieDeclarations]: Found specification of procedure putenv
[2020-09-24 20:28:24,116 INFO L130 BoogieDeclarations]: Found specification of procedure setenv
[2020-09-24 20:28:24,116 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv
[2020-09-24 20:28:24,116 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv
[2020-09-24 20:28:24,117 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp
[2020-09-24 20:28:24,117 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp
[2020-09-24 20:28:24,117 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps
[2020-09-24 20:28:24,117 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp
[2020-09-24 20:28:24,117 INFO L130 BoogieDeclarations]: Found specification of procedure system
[2020-09-24 20:28:24,117 INFO L130 BoogieDeclarations]: Found specification of procedure realpath
[2020-09-24 20:28:24,117 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch
[2020-09-24 20:28:24,118 INFO L130 BoogieDeclarations]: Found specification of procedure qsort
[2020-09-24 20:28:24,118 INFO L130 BoogieDeclarations]: Found specification of procedure abs
[2020-09-24 20:28:24,118 INFO L130 BoogieDeclarations]: Found specification of procedure labs
[2020-09-24 20:28:24,119 INFO L130 BoogieDeclarations]: Found specification of procedure llabs
[2020-09-24 20:28:24,119 INFO L130 BoogieDeclarations]: Found specification of procedure div
[2020-09-24 20:28:24,119 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv
[2020-09-24 20:28:24,119 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv
[2020-09-24 20:28:24,119 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt
[2020-09-24 20:28:24,119 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt
[2020-09-24 20:28:24,120 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt
[2020-09-24 20:28:24,120 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt
[2020-09-24 20:28:24,120 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt
[2020-09-24 20:28:24,120 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt
[2020-09-24 20:28:24,120 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r
[2020-09-24 20:28:24,120 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r
[2020-09-24 20:28:24,120 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r
[2020-09-24 20:28:24,121 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r
[2020-09-24 20:28:24,121 INFO L130 BoogieDeclarations]: Found specification of procedure mblen
[2020-09-24 20:28:24,121 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc
[2020-09-24 20:28:24,121 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb
[2020-09-24 20:28:24,121 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs
[2020-09-24 20:28:24,121 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs
[2020-09-24 20:28:24,122 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch
[2020-09-24 20:28:24,122 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt
[2020-09-24 20:28:24,123 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg
[2020-09-24 20:28:24,123 INFO L130 BoogieDeclarations]: Found specification of procedure myexit
[2020-09-24 20:28:24,123 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2020-09-24 20:28:24,124 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap
[2020-09-24 20:28:24,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~int
[2020-09-24 20:28:24,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$
[2020-09-24 20:28:24,124 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$
[2020-09-24 20:28:24,124 INFO L130 BoogieDeclarations]: Found specification of procedure read~int
[2020-09-24 20:28:24,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-09-24 20:28:24,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-09-24 20:28:24,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2020-09-24 20:28:24,536 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true;
[2020-09-24 20:28:24,754 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-09-24 20:28:24,754 INFO L295 CfgBuilder]: Removed 4 assume(true) statements.
[2020-09-24 20:28:24,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:28:24 BoogieIcfgContainer
[2020-09-24 20:28:24,762 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-09-24 20:28:24,766 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-09-24 20:28:24,766 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2020-09-24 20:28:24,772 INFO L275 PluginConnector]: TraceAbstraction initialized
[2020-09-24 20:28:24,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 08:28:23" (1/3) ...
[2020-09-24 20:28:24,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a42bc73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:28:24, skipping insertion in model container
[2020-09-24 20:28:24,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:28:23" (2/3) ...
[2020-09-24 20:28:24,775 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a42bc73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:28:24, skipping insertion in model container
[2020-09-24 20:28:24,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:28:24" (3/3) ...
[2020-09-24 20:28:24,777 INFO L109 eAbstractionObserver]: Analyzing ICFG list-2.i
[2020-09-24 20:28:24,786 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-09-24 20:28:24,796 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-09-24 20:28:24,817 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-09-24 20:28:24,847 INFO L375 AbstractCegarLoop]: Interprodecural is true
[2020-09-24 20:28:24,847 INFO L376 AbstractCegarLoop]: Hoare is true
[2020-09-24 20:28:24,847 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-09-24 20:28:24,847 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-09-24 20:28:24,847 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-09-24 20:28:24,848 INFO L380 AbstractCegarLoop]: Difference is false
[2020-09-24 20:28:24,848 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-09-24 20:28:24,848 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-09-24 20:28:24,875 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states.
[2020-09-24 20:28:24,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2020-09-24 20:28:24,885 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 20:28:24,886 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]
[2020-09-24 20:28:24,887 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 20:28:24,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 20:28:24,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1227115345, now seen corresponding path program 1 times
[2020-09-24 20:28:24,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 20:28:24,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1699703806]
[2020-09-24 20:28:24,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 20:28:25,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 20:28:25,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:28:25,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:28:25,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:28:25,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:28:25,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:28:25,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 20:28:25,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29
[2020-09-24 20:28:25,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5
[2020-09-24 20:28:25,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 561
[2020-09-24 20:28:25,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-09-24 20:28:25,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5
[2020-09-24 20:28:25,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18
[2020-09-24 20:28:25,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9
[2020-09-24 20:28:25,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5
[2020-09-24 20:28:25,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 20:28:25,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 20:28:25,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:28:25,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 20:28:25,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 20:28:25,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 20:28:25,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21
[2020-09-24 20:28:25,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-09-24 20:28:25,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 20:28:25,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 20:28:25,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 20:28:25,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2
[2020-09-24 20:28:25,813 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 20:28:25,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1699703806]
[2020-09-24 20:28:25,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 20:28:25,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2020-09-24 20:28:25,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347637044]
[2020-09-24 20:28:25,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-09-24 20:28:25,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 20:28:25,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-09-24 20:28:25,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2020-09-24 20:28:25,848 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 7 states.
[2020-09-24 20:28:26,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 20:28:26,361 INFO L93 Difference]: Finished difference Result 198 states and 237 transitions.
[2020-09-24 20:28:26,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states.
[2020-09-24 20:28:26,366 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22
[2020-09-24 20:28:26,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 20:28:26,383 INFO L225 Difference]: With dead ends: 198
[2020-09-24 20:28:26,383 INFO L226 Difference]: Without dead ends: 128
[2020-09-24 20:28:26,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110
[2020-09-24 20:28:26,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states.
[2020-09-24 20:28:26,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 70.
[2020-09-24 20:28:26,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states.
[2020-09-24 20:28:26,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions.
[2020-09-24 20:28:26,467 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 22
[2020-09-24 20:28:26,467 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 20:28:26,467 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions.
[2020-09-24 20:28:26,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-09-24 20:28:26,468 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions.
[2020-09-24 20:28:26,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37
[2020-09-24 20:28:26,469 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 20:28:26,470 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 20:28:26,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-09-24 20:28:26,470 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 20:28:26,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 20:28:26,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1213729417, now seen corresponding path program 1 times
[2020-09-24 20:28:26,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 20:28:26,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269246248]
[2020-09-24 20:28:26,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 20:28:26,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 20:28:26,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:28:26,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 20:28:26,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43
[2020-09-24 20:28:26,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 20:28:26,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 144
[2020-09-24 20:28:26,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-09-24 20:28:26,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5
[2020-09-24 20:28:26,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18
[2020-09-24 20:28:26,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14
[2020-09-24 20:28:26,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 20:28:26,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 20:28:26,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 20:28:26,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:28:26,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 20:28:26,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 20:28:26,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 20:28:26,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9
[2020-09-24 20:28:26,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-09-24 20:28:26,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 20:28:26,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 20:28:26,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 20:28:26,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 20:28:26,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 20:28:26,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1269246248]
[2020-09-24 20:28:26,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 20:28:26,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2020-09-24 20:28:26,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217605842]
[2020-09-24 20:28:26,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-09-24 20:28:26,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 20:28:26,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-09-24 20:28:26,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2020-09-24 20:28:26,734 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand 7 states.
[2020-09-24 20:28:27,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 20:28:27,023 INFO L93 Difference]: Finished difference Result 137 states and 145 transitions.
[2020-09-24 20:28:27,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states.
[2020-09-24 20:28:27,023 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36
[2020-09-24 20:28:27,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 20:28:27,025 INFO L225 Difference]: With dead ends: 137
[2020-09-24 20:28:27,025 INFO L226 Difference]: Without dead ends: 122
[2020-09-24 20:28:27,027 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72
[2020-09-24 20:28:27,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states.
[2020-09-24 20:28:27,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 67.
[2020-09-24 20:28:27,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states.
[2020-09-24 20:28:27,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions.
[2020-09-24 20:28:27,040 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 36
[2020-09-24 20:28:27,041 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 20:28:27,041 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions.
[2020-09-24 20:28:27,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-09-24 20:28:27,041 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions.
[2020-09-24 20:28:27,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37
[2020-09-24 20:28:27,043 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 20:28:27,046 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 20:28:27,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-09-24 20:28:27,046 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 20:28:27,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 20:28:27,047 INFO L82 PathProgramCache]: Analyzing trace with hash -2044556103, now seen corresponding path program 1 times
[2020-09-24 20:28:27,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 20:28:27,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1921610698]
[2020-09-24 20:28:27,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 20:28:27,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 20:28:27,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:28:27,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 20:28:27,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43
[2020-09-24 20:28:27,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 20:28:27,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138
[2020-09-24 20:28:27,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-09-24 20:28:27,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5
[2020-09-24 20:28:27,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18
[2020-09-24 20:28:27,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11
[2020-09-24 20:28:27,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 20:28:27,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 20:28:27,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 20:28:27,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:28:27,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 20:28:27,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 20:28:27,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 20:28:27,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11
[2020-09-24 20:28:27,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-09-24 20:28:27,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 20:28:27,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 20:28:27,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 20:28:27,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 20:28:27,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 20:28:27,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1921610698]
[2020-09-24 20:28:27,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 20:28:27,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2020-09-24 20:28:27,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93787413]
[2020-09-24 20:28:27,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-09-24 20:28:27,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 20:28:27,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-09-24 20:28:27,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2020-09-24 20:28:27,293 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand 7 states.
[2020-09-24 20:28:27,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 20:28:27,527 INFO L93 Difference]: Finished difference Result 119 states and 126 transitions.
[2020-09-24 20:28:27,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states.
[2020-09-24 20:28:27,528 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36
[2020-09-24 20:28:27,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 20:28:27,529 INFO L225 Difference]: With dead ends: 119
[2020-09-24 20:28:27,529 INFO L226 Difference]: Without dead ends: 95
[2020-09-24 20:28:27,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72
[2020-09-24 20:28:27,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states.
[2020-09-24 20:28:27,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 62.
[2020-09-24 20:28:27,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states.
[2020-09-24 20:28:27,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions.
[2020-09-24 20:28:27,544 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 36
[2020-09-24 20:28:27,545 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 20:28:27,545 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions.
[2020-09-24 20:28:27,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-09-24 20:28:27,545 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions.
[2020-09-24 20:28:27,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42
[2020-09-24 20:28:27,550 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 20:28:27,551 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 20:28:27,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-09-24 20:28:27,551 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 20:28:27,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 20:28:27,553 INFO L82 PathProgramCache]: Analyzing trace with hash -833752717, now seen corresponding path program 1 times
[2020-09-24 20:28:27,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 20:28:27,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [98305739]
[2020-09-24 20:28:27,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 20:28:27,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 20:28:27,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:28:27,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:28:28,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 20:28:28,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48
[2020-09-24 20:28:28,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-24 20:28:28,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1103
[2020-09-24 20:28:28,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-09-24 20:28:28,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13
[2020-09-24 20:28:28,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14
[2020-09-24 20:28:28,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26
[2020-09-24 20:28:28,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 20:28:28,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 20:28:28,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 20:28:28,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:28:28,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 20:28:28,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 20:28:28,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 20:28:28,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10
[2020-09-24 20:28:28,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-09-24 20:28:28,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 20:28:28,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 20:28:28,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 20:28:28,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 20:28:29,002 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 20:28:29,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [98305739]
[2020-09-24 20:28:29,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 20:28:29,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15
[2020-09-24 20:28:29,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815334122]
[2020-09-24 20:28:29,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states
[2020-09-24 20:28:29,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 20:28:29,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2020-09-24 20:28:29,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210
[2020-09-24 20:28:29,009 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 15 states.
[2020-09-24 20:28:30,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 20:28:30,050 INFO L93 Difference]: Finished difference Result 157 states and 166 transitions.
[2020-09-24 20:28:30,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states.
[2020-09-24 20:28:30,052 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41
[2020-09-24 20:28:30,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 20:28:30,054 INFO L225 Difference]: With dead ends: 157
[2020-09-24 20:28:30,055 INFO L226 Difference]: Without dead ends: 144
[2020-09-24 20:28:30,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=228, Invalid=764, Unknown=0, NotChecked=0, Total=992
[2020-09-24 20:28:30,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states.
[2020-09-24 20:28:30,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 78.
[2020-09-24 20:28:30,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states.
[2020-09-24 20:28:30,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions.
[2020-09-24 20:28:30,071 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 41
[2020-09-24 20:28:30,073 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 20:28:30,073 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions.
[2020-09-24 20:28:30,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states.
[2020-09-24 20:28:30,073 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions.
[2020-09-24 20:28:30,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42
[2020-09-24 20:28:30,074 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 20:28:30,075 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 20:28:30,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-09-24 20:28:30,075 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 20:28:30,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 20:28:30,076 INFO L82 PathProgramCache]: Analyzing trace with hash 865863745, now seen corresponding path program 1 times
[2020-09-24 20:28:30,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 20:28:30,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [416679589]
[2020-09-24 20:28:30,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 20:28:30,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 20:28:30,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:28:30,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:28:30,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 20:28:30,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48
[2020-09-24 20:28:30,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-24 20:28:30,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 880
[2020-09-24 20:28:30,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-09-24 20:28:30,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13
[2020-09-24 20:28:30,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14
[2020-09-24 20:28:30,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29
[2020-09-24 20:28:30,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 20:28:31,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 20:28:31,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 20:28:31,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:28:31,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 20:28:31,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 20:28:31,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 20:28:31,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8
[2020-09-24 20:28:31,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-09-24 20:28:31,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 20:28:31,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 20:28:31,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 20:28:31,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 20:28:31,256 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 20:28:31,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [416679589]
[2020-09-24 20:28:31,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 20:28:31,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15
[2020-09-24 20:28:31,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790164769]
[2020-09-24 20:28:31,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states
[2020-09-24 20:28:31,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 20:28:31,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2020-09-24 20:28:31,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210
[2020-09-24 20:28:31,259 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand 15 states.
[2020-09-24 20:28:32,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 20:28:32,154 INFO L93 Difference]: Finished difference Result 181 states and 193 transitions.
[2020-09-24 20:28:32,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states.
[2020-09-24 20:28:32,155 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41
[2020-09-24 20:28:32,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 20:28:32,161 INFO L225 Difference]: With dead ends: 181
[2020-09-24 20:28:32,161 INFO L226 Difference]: Without dead ends: 175
[2020-09-24 20:28:32,162 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=228, Invalid=764, Unknown=0, NotChecked=0, Total=992
[2020-09-24 20:28:32,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states.
[2020-09-24 20:28:32,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 100.
[2020-09-24 20:28:32,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states.
[2020-09-24 20:28:32,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 108 transitions.
[2020-09-24 20:28:32,181 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 108 transitions. Word has length 41
[2020-09-24 20:28:32,182 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 20:28:32,182 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 108 transitions.
[2020-09-24 20:28:32,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states.
[2020-09-24 20:28:32,182 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 108 transitions.
[2020-09-24 20:28:32,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48
[2020-09-24 20:28:32,184 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 20:28:32,184 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 20:28:32,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-09-24 20:28:32,184 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 20:28:32,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 20:28:32,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1077832869, now seen corresponding path program 1 times
[2020-09-24 20:28:32,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 20:28:32,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [243520989]
[2020-09-24 20:28:32,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 20:28:32,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 20:28:32,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:28:32,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 20:28:32,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54
[2020-09-24 20:28:32,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 20:28:32,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 633
[2020-09-24 20:28:32,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-09-24 20:28:32,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14
[2020-09-24 20:28:32,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14
[2020-09-24 20:28:32,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38
[2020-09-24 20:28:32,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 20:28:33,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 20:28:33,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 20:28:33,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:28:33,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 20:28:33,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 20:28:33,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 20:28:33,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7
[2020-09-24 20:28:33,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-09-24 20:28:33,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 20:28:33,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 20:28:33,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 20:28:33,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 20:28:33,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 20:28:33,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [243520989]
[2020-09-24 20:28:33,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 20:28:33,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16
[2020-09-24 20:28:33,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893894556]
[2020-09-24 20:28:33,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states
[2020-09-24 20:28:33,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 20:28:33,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2020-09-24 20:28:33,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240
[2020-09-24 20:28:33,156 INFO L87 Difference]: Start difference. First operand 100 states and 108 transitions. Second operand 16 states.
[2020-09-24 20:28:34,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 20:28:34,192 INFO L93 Difference]: Finished difference Result 165 states and 176 transitions.
[2020-09-24 20:28:34,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states.
[2020-09-24 20:28:34,192 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 47
[2020-09-24 20:28:34,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 20:28:34,194 INFO L225 Difference]: With dead ends: 165
[2020-09-24 20:28:34,194 INFO L226 Difference]: Without dead ends: 159
[2020-09-24 20:28:34,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992
[2020-09-24 20:28:34,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states.
[2020-09-24 20:28:34,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 104.
[2020-09-24 20:28:34,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states.
[2020-09-24 20:28:34,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 112 transitions.
[2020-09-24 20:28:34,211 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 112 transitions. Word has length 47
[2020-09-24 20:28:34,211 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 20:28:34,212 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 112 transitions.
[2020-09-24 20:28:34,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states.
[2020-09-24 20:28:34,212 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 112 transitions.
[2020-09-24 20:28:34,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48
[2020-09-24 20:28:34,213 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 20:28:34,214 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 20:28:34,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2020-09-24 20:28:34,214 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 20:28:34,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 20:28:34,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1893706375, now seen corresponding path program 1 times
[2020-09-24 20:28:34,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 20:28:34,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [367208851]
[2020-09-24 20:28:34,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 20:28:34,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 20:28:34,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:28:34,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 20:28:34,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54
[2020-09-24 20:28:34,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 20:28:34,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 610
[2020-09-24 20:28:34,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-09-24 20:28:34,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14
[2020-09-24 20:28:34,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14
[2020-09-24 20:28:34,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38
[2020-09-24 20:28:34,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2
[2020-09-24 20:28:35,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 20:28:35,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 20:28:35,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:28:35,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 20:28:35,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 20:28:35,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 20:28:35,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8
[2020-09-24 20:28:35,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-09-24 20:28:35,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 20:28:35,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 20:28:35,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 20:28:35,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 20:28:35,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 20:28:35,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [367208851]
[2020-09-24 20:28:35,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 20:28:35,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16
[2020-09-24 20:28:35,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25934571]
[2020-09-24 20:28:35,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states
[2020-09-24 20:28:35,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 20:28:35,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2020-09-24 20:28:35,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240
[2020-09-24 20:28:35,401 INFO L87 Difference]: Start difference. First operand 104 states and 112 transitions. Second operand 16 states.
[2020-09-24 20:28:36,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 20:28:36,626 INFO L93 Difference]: Finished difference Result 179 states and 190 transitions.
[2020-09-24 20:28:36,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states.
[2020-09-24 20:28:36,627 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 47
[2020-09-24 20:28:36,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 20:28:36,628 INFO L225 Difference]: With dead ends: 179
[2020-09-24 20:28:36,628 INFO L226 Difference]: Without dead ends: 173
[2020-09-24 20:28:36,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992
[2020-09-24 20:28:36,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states.
[2020-09-24 20:28:36,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 113.
[2020-09-24 20:28:36,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states.
[2020-09-24 20:28:36,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 122 transitions.
[2020-09-24 20:28:36,650 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 122 transitions. Word has length 47
[2020-09-24 20:28:36,650 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 20:28:36,650 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 122 transitions.
[2020-09-24 20:28:36,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states.
[2020-09-24 20:28:36,651 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 122 transitions.
[2020-09-24 20:28:36,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48
[2020-09-24 20:28:36,651 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 20:28:36,652 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 20:28:36,653 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6
[2020-09-24 20:28:36,653 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 20:28:36,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 20:28:36,653 INFO L82 PathProgramCache]: Analyzing trace with hash -857024599, now seen corresponding path program 1 times
[2020-09-24 20:28:36,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 20:28:36,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [358122462]
[2020-09-24 20:28:36,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 20:28:36,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 20:28:36,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:28:36,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:28:37,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 20:28:37,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54
[2020-09-24 20:28:37,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-24 20:28:37,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1147
[2020-09-24 20:28:37,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-09-24 20:28:37,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14
[2020-09-24 20:28:37,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14
[2020-09-24 20:28:37,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38
[2020-09-24 20:28:37,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 20:28:38,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 20:28:38,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 20:28:38,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:28:38,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 20:28:38,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 20:28:38,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 20:28:38,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7
[2020-09-24 20:28:38,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-09-24 20:28:38,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 20:28:38,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 20:28:38,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 20:28:38,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 20:28:38,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 20:28:38,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [358122462]
[2020-09-24 20:28:38,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 20:28:38,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16
[2020-09-24 20:28:38,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231759728]
[2020-09-24 20:28:38,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states
[2020-09-24 20:28:38,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 20:28:38,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2020-09-24 20:28:38,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240
[2020-09-24 20:28:38,124 INFO L87 Difference]: Start difference. First operand 113 states and 122 transitions. Second operand 16 states.
[2020-09-24 20:28:39,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 20:28:39,316 INFO L93 Difference]: Finished difference Result 188 states and 200 transitions.
[2020-09-24 20:28:39,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states.
[2020-09-24 20:28:39,317 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 47
[2020-09-24 20:28:39,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 20:28:39,319 INFO L225 Difference]: With dead ends: 188
[2020-09-24 20:28:39,320 INFO L226 Difference]: Without dead ends: 182
[2020-09-24 20:28:39,321 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992
[2020-09-24 20:28:39,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states.
[2020-09-24 20:28:39,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 113.
[2020-09-24 20:28:39,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states.
[2020-09-24 20:28:39,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 122 transitions.
[2020-09-24 20:28:39,329 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 122 transitions. Word has length 47
[2020-09-24 20:28:39,329 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 20:28:39,329 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 122 transitions.
[2020-09-24 20:28:39,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states.
[2020-09-24 20:28:39,330 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 122 transitions.
[2020-09-24 20:28:39,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53
[2020-09-24 20:28:39,330 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 20:28:39,330 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 20:28:39,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7
[2020-09-24 20:28:39,331 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 20:28:39,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 20:28:39,331 INFO L82 PathProgramCache]: Analyzing trace with hash 294895633, now seen corresponding path program 2 times
[2020-09-24 20:28:39,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 20:28:39,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [420698730]
[2020-09-24 20:28:39,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 20:28:39,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 20:28:39,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:28:39,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:28:41,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 20:28:41,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59
[2020-09-24 20:28:41,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-24 20:28:41,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1706
[2020-09-24 20:28:41,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-09-24 20:28:41,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19
[2020-09-24 20:28:41,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14
[2020-09-24 20:28:41,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37
[2020-09-24 20:28:41,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 20:28:41,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 20:28:41,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 20:28:41,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:28:41,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 20:28:41,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 20:28:41,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 20:28:41,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3
[2020-09-24 20:28:41,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-09-24 20:28:41,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 20:28:41,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 20:28:41,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 20:28:41,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 20:28:41,517 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 20:28:41,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [420698730]
[2020-09-24 20:28:41,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 20:28:41,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20
[2020-09-24 20:28:41,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987338377]
[2020-09-24 20:28:41,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states
[2020-09-24 20:28:41,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 20:28:41,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants.
[2020-09-24 20:28:41,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380
[2020-09-24 20:28:41,526 INFO L87 Difference]: Start difference. First operand 113 states and 122 transitions. Second operand 20 states.
[2020-09-24 20:28:42,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 20:28:42,526 INFO L93 Difference]: Finished difference Result 190 states and 204 transitions.
[2020-09-24 20:28:42,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states.
[2020-09-24 20:28:42,526 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 52
[2020-09-24 20:28:42,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 20:28:42,528 INFO L225 Difference]: With dead ends: 190
[2020-09-24 20:28:42,528 INFO L226 Difference]: Without dead ends: 177
[2020-09-24 20:28:42,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=296, Invalid=1110, Unknown=0, NotChecked=0, Total=1406
[2020-09-24 20:28:42,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states.
[2020-09-24 20:28:42,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 129.
[2020-09-24 20:28:42,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states.
[2020-09-24 20:28:42,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 139 transitions.
[2020-09-24 20:28:42,537 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 139 transitions. Word has length 52
[2020-09-24 20:28:42,537 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 20:28:42,538 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 139 transitions.
[2020-09-24 20:28:42,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states.
[2020-09-24 20:28:42,538 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 139 transitions.
[2020-09-24 20:28:42,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53
[2020-09-24 20:28:42,538 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 20:28:42,539 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 20:28:42,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8
[2020-09-24 20:28:42,539 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 20:28:42,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 20:28:42,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1689189507, now seen corresponding path program 1 times
[2020-09-24 20:28:42,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 20:28:42,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1672711796]
[2020-09-24 20:28:42,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 20:28:42,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 20:28:42,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:28:43,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:28:43,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 20:28:43,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59
[2020-09-24 20:28:43,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-24 20:28:43,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1328
[2020-09-24 20:28:43,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-09-24 20:28:43,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19
[2020-09-24 20:28:43,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14
[2020-09-24 20:28:43,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40
[2020-09-24 20:28:43,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 20:28:44,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 20:28:44,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 20:28:44,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:28:44,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 20:28:44,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 20:28:44,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 20:28:44,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7
[2020-09-24 20:28:44,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-09-24 20:28:44,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 20:28:44,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 20:28:44,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 20:28:44,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 20:28:44,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 20:28:44,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1672711796]
[2020-09-24 20:28:44,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 20:28:44,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20
[2020-09-24 20:28:44,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353355586]
[2020-09-24 20:28:44,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states
[2020-09-24 20:28:44,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 20:28:44,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants.
[2020-09-24 20:28:44,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380
[2020-09-24 20:28:44,358 INFO L87 Difference]: Start difference. First operand 129 states and 139 transitions. Second operand 20 states.
[2020-09-24 20:28:45,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 20:28:45,574 INFO L93 Difference]: Finished difference Result 232 states and 249 transitions.
[2020-09-24 20:28:45,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states.
[2020-09-24 20:28:45,575 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 52
[2020-09-24 20:28:45,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 20:28:45,577 INFO L225 Difference]: With dead ends: 232
[2020-09-24 20:28:45,577 INFO L226 Difference]: Without dead ends: 226
[2020-09-24 20:28:45,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=356, Invalid=1450, Unknown=0, NotChecked=0, Total=1806
[2020-09-24 20:28:45,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states.
[2020-09-24 20:28:45,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 143.
[2020-09-24 20:28:45,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states.
[2020-09-24 20:28:45,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 154 transitions.
[2020-09-24 20:28:45,586 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 154 transitions. Word has length 52
[2020-09-24 20:28:45,586 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 20:28:45,587 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 154 transitions.
[2020-09-24 20:28:45,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states.
[2020-09-24 20:28:45,587 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 154 transitions.
[2020-09-24 20:28:45,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53
[2020-09-24 20:28:45,588 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 20:28:45,588 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 20:28:45,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9
[2020-09-24 20:28:45,588 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 20:28:45,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 20:28:45,589 INFO L82 PathProgramCache]: Analyzing trace with hash -906161327, now seen corresponding path program 2 times
[2020-09-24 20:28:45,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 20:28:45,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2018553146]
[2020-09-24 20:28:45,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 20:28:45,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 20:28:45,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:28:45,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:28:47,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 20:28:47,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59
[2020-09-24 20:28:47,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-24 20:28:47,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1583
[2020-09-24 20:28:47,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-09-24 20:28:47,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19
[2020-09-24 20:28:47,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14
[2020-09-24 20:28:47,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40
[2020-09-24 20:28:47,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 20:28:47,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 20:28:47,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 20:28:47,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:28:47,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 20:28:47,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 20:28:47,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 20:28:47,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5
[2020-09-24 20:28:47,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-09-24 20:28:47,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 20:28:47,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 20:28:47,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 20:28:47,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 20:28:47,738 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 20:28:47,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2018553146]
[2020-09-24 20:28:47,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 20:28:47,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20
[2020-09-24 20:28:47,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139149513]
[2020-09-24 20:28:47,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states
[2020-09-24 20:28:47,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 20:28:47,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants.
[2020-09-24 20:28:47,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380
[2020-09-24 20:28:47,740 INFO L87 Difference]: Start difference. First operand 143 states and 154 transitions. Second operand 20 states.
[2020-09-24 20:28:49,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 20:28:49,288 INFO L93 Difference]: Finished difference Result 245 states and 264 transitions.
[2020-09-24 20:28:49,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states.
[2020-09-24 20:28:49,289 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 52
[2020-09-24 20:28:49,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 20:28:49,291 INFO L225 Difference]: With dead ends: 245
[2020-09-24 20:28:49,291 INFO L226 Difference]: Without dead ends: 239
[2020-09-24 20:28:49,292 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=289, Invalid=1117, Unknown=0, NotChecked=0, Total=1406
[2020-09-24 20:28:49,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states.
[2020-09-24 20:28:49,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 145.
[2020-09-24 20:28:49,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states.
[2020-09-24 20:28:49,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 157 transitions.
[2020-09-24 20:28:49,300 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 157 transitions. Word has length 52
[2020-09-24 20:28:49,300 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 20:28:49,300 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 157 transitions.
[2020-09-24 20:28:49,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states.
[2020-09-24 20:28:49,301 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 157 transitions.
[2020-09-24 20:28:49,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54
[2020-09-24 20:28:49,301 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 20:28:49,301 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 20:28:49,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10
[2020-09-24 20:28:49,302 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 20:28:49,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 20:28:49,302 INFO L82 PathProgramCache]: Analyzing trace with hash 219391251, now seen corresponding path program 1 times
[2020-09-24 20:28:49,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 20:28:49,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [878563029]
[2020-09-24 20:28:49,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 20:28:49,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 20:28:49,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:28:49,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 20:28:49,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60
[2020-09-24 20:28:49,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 20:28:49,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 435
[2020-09-24 20:28:49,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-09-24 20:28:49,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14
[2020-09-24 20:28:49,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14
[2020-09-24 20:28:49,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35
[2020-09-24 20:28:49,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 20:28:50,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 20:28:50,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 20:28:50,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:28:50,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 20:28:50,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 20:28:50,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 20:28:50,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5
[2020-09-24 20:28:50,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-09-24 20:28:50,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 20:28:50,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 20:28:50,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 20:28:50,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 20:28:50,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 20:28:50,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [878563029]
[2020-09-24 20:28:50,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 20:28:50,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16
[2020-09-24 20:28:50,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962518272]
[2020-09-24 20:28:50,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states
[2020-09-24 20:28:50,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 20:28:50,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2020-09-24 20:28:50,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240
[2020-09-24 20:28:50,075 INFO L87 Difference]: Start difference. First operand 145 states and 157 transitions. Second operand 16 states.
[2020-09-24 20:28:51,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 20:28:51,239 INFO L93 Difference]: Finished difference Result 218 states and 234 transitions.
[2020-09-24 20:28:51,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states.
[2020-09-24 20:28:51,240 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 53
[2020-09-24 20:28:51,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 20:28:51,241 INFO L225 Difference]: With dead ends: 218
[2020-09-24 20:28:51,241 INFO L226 Difference]: Without dead ends: 203
[2020-09-24 20:28:51,242 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992
[2020-09-24 20:28:51,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states.
[2020-09-24 20:28:51,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 149.
[2020-09-24 20:28:51,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states.
[2020-09-24 20:28:51,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 161 transitions.
[2020-09-24 20:28:51,252 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 161 transitions. Word has length 53
[2020-09-24 20:28:51,252 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 20:28:51,252 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 161 transitions.
[2020-09-24 20:28:51,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states.
[2020-09-24 20:28:51,253 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 161 transitions.
[2020-09-24 20:28:51,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54
[2020-09-24 20:28:51,253 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 20:28:51,254 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 20:28:51,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11
[2020-09-24 20:28:51,254 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 20:28:51,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 20:28:51,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1256073027, now seen corresponding path program 2 times
[2020-09-24 20:28:51,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 20:28:51,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [471796950]
[2020-09-24 20:28:51,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 20:28:51,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 20:28:51,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:28:51,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 20:28:51,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60
[2020-09-24 20:28:51,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 20:28:51,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 460
[2020-09-24 20:28:51,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-09-24 20:28:51,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14
[2020-09-24 20:28:51,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14
[2020-09-24 20:28:51,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32
[2020-09-24 20:28:51,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 20:28:52,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 20:28:52,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 20:28:52,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:28:52,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 20:28:52,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 20:28:52,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 20:28:52,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5
[2020-09-24 20:28:52,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-09-24 20:28:52,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 20:28:52,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 20:28:52,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 20:28:52,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 20:28:52,032 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 20:28:52,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [471796950]
[2020-09-24 20:28:52,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 20:28:52,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16
[2020-09-24 20:28:52,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247657651]
[2020-09-24 20:28:52,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states
[2020-09-24 20:28:52,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 20:28:52,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2020-09-24 20:28:52,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240
[2020-09-24 20:28:52,035 INFO L87 Difference]: Start difference. First operand 149 states and 161 transitions. Second operand 16 states.
[2020-09-24 20:28:53,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 20:28:53,077 INFO L93 Difference]: Finished difference Result 200 states and 215 transitions.
[2020-09-24 20:28:53,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states.
[2020-09-24 20:28:53,078 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 53
[2020-09-24 20:28:53,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 20:28:53,079 INFO L225 Difference]: With dead ends: 200
[2020-09-24 20:28:53,079 INFO L226 Difference]: Without dead ends: 170
[2020-09-24 20:28:53,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930
[2020-09-24 20:28:53,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states.
[2020-09-24 20:28:53,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 140.
[2020-09-24 20:28:53,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states.
[2020-09-24 20:28:53,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 151 transitions.
[2020-09-24 20:28:53,087 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 151 transitions. Word has length 53
[2020-09-24 20:28:53,087 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 20:28:53,087 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 151 transitions.
[2020-09-24 20:28:53,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states.
[2020-09-24 20:28:53,088 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 151 transitions.
[2020-09-24 20:28:53,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54
[2020-09-24 20:28:53,088 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 20:28:53,088 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 20:28:53,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12
[2020-09-24 20:28:53,089 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 20:28:53,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 20:28:53,089 INFO L82 PathProgramCache]: Analyzing trace with hash 164878513, now seen corresponding path program 2 times
[2020-09-24 20:28:53,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 20:28:53,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [883150821]
[2020-09-24 20:28:53,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 20:28:53,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 20:28:53,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:28:53,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 20:28:53,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60
[2020-09-24 20:28:53,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 20:28:53,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 432
[2020-09-24 20:28:53,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-09-24 20:28:53,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14
[2020-09-24 20:28:53,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14
[2020-09-24 20:28:53,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35
[2020-09-24 20:28:53,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 20:28:53,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 20:28:53,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 20:28:53,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:28:53,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 20:28:53,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 20:28:53,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 20:28:53,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5
[2020-09-24 20:28:53,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-09-24 20:28:53,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 20:28:53,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 20:28:53,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 20:28:53,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 20:28:53,846 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 20:28:53,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [883150821]
[2020-09-24 20:28:53,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 20:28:53,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16
[2020-09-24 20:28:53,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025699485]
[2020-09-24 20:28:53,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states
[2020-09-24 20:28:53,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 20:28:53,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2020-09-24 20:28:53,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240
[2020-09-24 20:28:53,849 INFO L87 Difference]: Start difference. First operand 140 states and 151 transitions. Second operand 16 states.
[2020-09-24 20:28:55,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 20:28:55,039 INFO L93 Difference]: Finished difference Result 211 states and 225 transitions.
[2020-09-24 20:28:55,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states.
[2020-09-24 20:28:55,040 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 53
[2020-09-24 20:28:55,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 20:28:55,042 INFO L225 Difference]: With dead ends: 211
[2020-09-24 20:28:55,042 INFO L226 Difference]: Without dead ends: 190
[2020-09-24 20:28:55,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992
[2020-09-24 20:28:55,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states.
[2020-09-24 20:28:55,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 133.
[2020-09-24 20:28:55,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states.
[2020-09-24 20:28:55,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 143 transitions.
[2020-09-24 20:28:55,050 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 143 transitions. Word has length 53
[2020-09-24 20:28:55,051 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 20:28:55,051 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 143 transitions.
[2020-09-24 20:28:55,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states.
[2020-09-24 20:28:55,051 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 143 transitions.
[2020-09-24 20:28:55,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54
[2020-09-24 20:28:55,052 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 20:28:55,052 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 20:28:55,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13
[2020-09-24 20:28:55,052 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 20:28:55,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 20:28:55,053 INFO L82 PathProgramCache]: Analyzing trace with hash 492828385, now seen corresponding path program 1 times
[2020-09-24 20:28:55,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 20:28:55,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1925533615]
[2020-09-24 20:28:55,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 20:28:55,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 20:28:55,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:28:55,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:28:56,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 20:28:56,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60
[2020-09-24 20:28:56,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-24 20:28:56,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1294
[2020-09-24 20:28:56,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-09-24 20:28:56,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14
[2020-09-24 20:28:56,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14
[2020-09-24 20:28:56,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35
[2020-09-24 20:28:56,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 20:28:56,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 20:28:56,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 20:28:56,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:28:56,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 20:28:56,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 20:28:56,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 20:28:56,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5
[2020-09-24 20:28:56,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-09-24 20:28:56,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 20:28:56,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 20:28:56,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 20:28:56,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 20:28:56,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 20:28:56,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1925533615]
[2020-09-24 20:28:56,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 20:28:56,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16
[2020-09-24 20:28:56,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008110342]
[2020-09-24 20:28:56,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states
[2020-09-24 20:28:56,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 20:28:56,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2020-09-24 20:28:56,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240
[2020-09-24 20:28:56,676 INFO L87 Difference]: Start difference. First operand 133 states and 143 transitions. Second operand 16 states.
[2020-09-24 20:28:57,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 20:28:57,839 INFO L93 Difference]: Finished difference Result 205 states and 218 transitions.
[2020-09-24 20:28:57,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states.
[2020-09-24 20:28:57,839 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 53
[2020-09-24 20:28:57,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 20:28:57,840 INFO L225 Difference]: With dead ends: 205
[2020-09-24 20:28:57,841 INFO L226 Difference]: Without dead ends: 190
[2020-09-24 20:28:57,841 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992
[2020-09-24 20:28:57,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states.
[2020-09-24 20:28:57,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 133.
[2020-09-24 20:28:57,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states.
[2020-09-24 20:28:57,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 143 transitions.
[2020-09-24 20:28:57,852 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 143 transitions. Word has length 53
[2020-09-24 20:28:57,852 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 20:28:57,852 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 143 transitions.
[2020-09-24 20:28:57,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states.
[2020-09-24 20:28:57,852 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 143 transitions.
[2020-09-24 20:28:57,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54
[2020-09-24 20:28:57,856 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 20:28:57,857 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 20:28:57,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14
[2020-09-24 20:28:57,857 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 20:28:57,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 20:28:57,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1529510161, now seen corresponding path program 2 times
[2020-09-24 20:28:57,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 20:28:57,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [705265377]
[2020-09-24 20:28:57,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 20:28:57,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 20:28:57,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:28:57,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:28:58,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 20:28:58,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60
[2020-09-24 20:28:58,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-24 20:28:58,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1037
[2020-09-24 20:28:58,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-09-24 20:28:58,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14
[2020-09-24 20:28:58,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14
[2020-09-24 20:28:58,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32
[2020-09-24 20:28:58,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 20:28:59,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 20:28:59,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 20:28:59,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:28:59,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 20:28:59,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 20:28:59,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 20:28:59,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5
[2020-09-24 20:28:59,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-09-24 20:28:59,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 20:28:59,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 20:28:59,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 20:28:59,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 20:28:59,192 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 20:28:59,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [705265377]
[2020-09-24 20:28:59,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 20:28:59,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16
[2020-09-24 20:28:59,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920413955]
[2020-09-24 20:28:59,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states
[2020-09-24 20:28:59,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 20:28:59,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2020-09-24 20:28:59,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240
[2020-09-24 20:28:59,194 INFO L87 Difference]: Start difference. First operand 133 states and 143 transitions. Second operand 16 states.
[2020-09-24 20:29:00,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 20:29:00,295 INFO L93 Difference]: Finished difference Result 187 states and 199 transitions.
[2020-09-24 20:29:00,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states.
[2020-09-24 20:29:00,296 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 53
[2020-09-24 20:29:00,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 20:29:00,297 INFO L225 Difference]: With dead ends: 187
[2020-09-24 20:29:00,298 INFO L226 Difference]: Without dead ends: 157
[2020-09-24 20:29:00,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930
[2020-09-24 20:29:00,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states.
[2020-09-24 20:29:00,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 124.
[2020-09-24 20:29:00,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states.
[2020-09-24 20:29:00,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 133 transitions.
[2020-09-24 20:29:00,307 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 133 transitions. Word has length 53
[2020-09-24 20:29:00,307 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 20:29:00,307 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 133 transitions.
[2020-09-24 20:29:00,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states.
[2020-09-24 20:29:00,308 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 133 transitions.
[2020-09-24 20:29:00,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59
[2020-09-24 20:29:00,308 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 20:29:00,309 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 20:29:00,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15
[2020-09-24 20:29:00,309 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 20:29:00,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 20:29:00,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1525845127, now seen corresponding path program 3 times
[2020-09-24 20:29:00,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 20:29:00,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1456416264]
[2020-09-24 20:29:00,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 20:29:00,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 20:29:00,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:29:01,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 20:29:01,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65
[2020-09-24 20:29:01,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 20:29:01,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 882
[2020-09-24 20:29:01,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-09-24 20:29:01,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20
[2020-09-24 20:29:01,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14
[2020-09-24 20:29:01,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43
[2020-09-24 20:29:01,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 20:29:02,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 20:29:02,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 20:29:02,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 20:29:02,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000
[2020-09-24 20:29:02,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 20:29:02,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 20:29:02,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5
[2020-09-24 20:29:02,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-09-24 20:29:02,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 20:29:02,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 20:29:02,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 20:29:02,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 20:29:02,148 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 20:29:02,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1456416264]
[2020-09-24 20:29:02,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 20:29:02,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22
[2020-09-24 20:29:02,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933873723]
[2020-09-24 20:29:02,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states
[2020-09-24 20:29:02,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 20:29:02,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants.
[2020-09-24 20:29:02,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462
[2020-09-24 20:29:02,151 INFO L87 Difference]: Start difference. First operand 124 states and 133 transitions. Second operand 22 states.
[2020-09-24 20:29:02,824 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56
[2020-09-24 20:29:03,508 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57
[2020-09-24 20:29:04,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 20:29:04,474 INFO L93 Difference]: Finished difference Result 213 states and 227 transitions.
[2020-09-24 20:29:04,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states.
[2020-09-24 20:29:04,475 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 58
[2020-09-24 20:29:04,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 20:29:04,476 INFO L225 Difference]: With dead ends: 213
[2020-09-24 20:29:04,476 INFO L226 Difference]: Without dead ends: 200
[2020-09-24 20:29:04,478 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=372, Invalid=2078, Unknown=0, NotChecked=0, Total=2450
[2020-09-24 20:29:04,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states.
[2020-09-24 20:29:04,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 144.
[2020-09-24 20:29:04,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states.
[2020-09-24 20:29:04,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 154 transitions.
[2020-09-24 20:29:04,486 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 154 transitions. Word has length 58
[2020-09-24 20:29:04,486 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 20:29:04,486 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 154 transitions.
[2020-09-24 20:29:04,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states.
[2020-09-24 20:29:04,487 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 154 transitions.
[2020-09-24 20:29:04,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59
[2020-09-24 20:29:04,487 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 20:29:04,488 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 20:29:04,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16
[2020-09-24 20:29:04,488 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 20:29:04,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 20:29:04,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1049071675, now seen corresponding path program 1 times
[2020-09-24 20:29:04,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 20:29:04,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [693924146]
[2020-09-24 20:29:04,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 20:29:04,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-09-24 20:29:04,508 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2020-09-24 20:29:04,508 INFO L520 BasicCegarLoop]: Counterexample might be feasible
[2020-09-24 20:29:04,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17
[2020-09-24 20:29:04,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 08:29:04 BoogieIcfgContainer
[2020-09-24 20:29:04,532 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-09-24 20:29:04,534 INFO L168 Benchmark]: Toolchain (without parser) took 41358.26 ms. Allocated memory was 148.9 MB in the beginning and 487.6 MB in the end (delta: 338.7 MB). Free memory was 104.2 MB in the beginning and 362.4 MB in the end (delta: -258.1 MB). Peak memory consumption was 80.5 MB. Max. memory is 7.1 GB.
[2020-09-24 20:29:04,535 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 148.9 MB. Free memory was 123.6 MB in the beginning and 123.1 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB.
[2020-09-24 20:29:04,535 INFO L168 Benchmark]: CACSL2BoogieTranslator took 741.62 ms. Allocated memory was 148.9 MB in the beginning and 205.5 MB in the end (delta: 56.6 MB). Free memory was 103.4 MB in the beginning and 172.0 MB in the end (delta: -68.6 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB.
[2020-09-24 20:29:04,536 INFO L168 Benchmark]: Boogie Preprocessor took 95.07 ms. Allocated memory is still 205.5 MB. Free memory was 172.0 MB in the beginning and 169.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB.
[2020-09-24 20:29:04,537 INFO L168 Benchmark]: RCFGBuilder took 743.07 ms. Allocated memory is still 205.5 MB. Free memory was 169.2 MB in the beginning and 121.7 MB in the end (delta: 47.6 MB). Peak memory consumption was 47.6 MB. Max. memory is 7.1 GB.
[2020-09-24 20:29:04,538 INFO L168 Benchmark]: TraceAbstraction took 39765.94 ms. Allocated memory was 205.5 MB in the beginning and 487.6 MB in the end (delta: 282.1 MB). Free memory was 120.8 MB in the beginning and 362.4 MB in the end (delta: -241.6 MB). Peak memory consumption was 40.5 MB. Max. memory is 7.1 GB.
[2020-09-24 20:29:04,541 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.26 ms. Allocated memory is still 148.9 MB. Free memory was 123.6 MB in the beginning and 123.1 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB.
* CACSL2BoogieTranslator took 741.62 ms. Allocated memory was 148.9 MB in the beginning and 205.5 MB in the end (delta: 56.6 MB). Free memory was 103.4 MB in the beginning and 172.0 MB in the end (delta: -68.6 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB.
* Boogie Preprocessor took 95.07 ms. Allocated memory is still 205.5 MB. Free memory was 172.0 MB in the beginning and 169.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB.
* RCFGBuilder took 743.07 ms. Allocated memory is still 205.5 MB. Free memory was 169.2 MB in the beginning and 121.7 MB in the end (delta: 47.6 MB). Peak memory consumption was 47.6 MB. Max. memory is 7.1 GB.
* TraceAbstraction took 39765.94 ms. Allocated memory was 205.5 MB in the beginning and 487.6 MB in the end (delta: 282.1 MB). Free memory was 120.8 MB in the beginning and 362.4 MB in the end (delta: -241.6 MB). Peak memory consumption was 40.5 MB. Max. memory is 7.1 GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- CounterExampleResult [Line: 546]: a call of __VERIFIER_error() is reachable
a call of __VERIFIER_error() is reachable
We found a FailurePath:
[L521] List a = (List) malloc(sizeof(struct node));
[L522] COND FALSE !(a == 0)
[L523] List t;
[L524] List p = a;
[L525] COND TRUE __VERIFIER_nondet_int()
[L526] p->h = 1
[L527] t = (List) malloc(sizeof(struct node))
[L528] COND FALSE !(t == 0)
[L529] p->n = t
[L530] EXPR p->n
[L530] p = p->n
[L525] COND FALSE !(__VERIFIER_nondet_int())
[L532] COND TRUE __VERIFIER_nondet_int()
[L533] p->h = 2
[L534] t = (List) malloc(sizeof(struct node))
[L535] COND FALSE !(t == 0)
[L536] p->n = t
[L537] EXPR p->n
[L537] p = p->n
[L532] COND FALSE !(__VERIFIER_nondet_int())
[L539] p->h = 3
[L540] p = a
[L541] EXPR p->h
[L541] COND FALSE !(p->h == 2)
[L543] EXPR p->h
[L543] COND TRUE p->h == 1
[L544] EXPR p->n
[L544] p = p->n
[L543] EXPR p->h
[L543] COND FALSE !(p->h == 1)
[L545] EXPR p->h
[L545] COND TRUE p->h != 3
[L546] __VERIFIER_error()
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 9 procedures, 91 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 39.6s, OverallIterations: 18, TraceHistogramMax: 3, AutomataDifference: 18.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1020 SDtfs, 4578 SDslu, 8963 SDs, 0 SdLazy, 7780 SolverSat, 736 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 536 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 482 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2404 ImplicationChecksByTransitivity, 13.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=149occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 17 MinimizatonAttempts, 983 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 20.2s InterpolantComputationTime, 854 NumberOfCodeBlocks, 854 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 779 ConstructedInterpolants, 0 QuantifiedInterpolants, 400649 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 17 InterpolantComputations, 3 PerfectInterpolantSequences, 32/119 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available
RESULT: Ultimate proved your program to be incorrect!
Received shutdown request...