/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=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --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-ext2-properties/list_and_tree_cnstr-1.i
--------------------------------------------------------------------------------
This is Ultimate 0.1.25-c90d42b
[2020-09-24 19:24:28,994 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2020-09-24 19:24:28,998 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2020-09-24 19:24:29,049 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-09-24 19:24:29,050 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-09-24 19:24:29,061 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-09-24 19:24:29,063 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-09-24 19:24:29,066 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2020-09-24 19:24:29,069 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-09-24 19:24:29,071 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-09-24 19:24:29,073 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2020-09-24 19:24:29,075 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-09-24 19:24:29,076 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-09-24 19:24:29,081 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-09-24 19:24:29,084 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-09-24 19:24:29,085 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-09-24 19:24:29,087 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-09-24 19:24:29,088 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-09-24 19:24:29,090 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-09-24 19:24:29,098 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2020-09-24 19:24:29,101 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-09-24 19:24:29,103 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-09-24 19:24:29,104 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2020-09-24 19:24:29,105 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-09-24 19:24:29,110 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-09-24 19:24:29,111 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-09-24 19:24:29,111 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-09-24 19:24:29,114 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-09-24 19:24:29,115 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-09-24 19:24:29,116 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-09-24 19:24:29,116 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-09-24 19:24:29,117 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-09-24 19:24:29,118 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-09-24 19:24:29,119 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values
[2020-09-24 19:24:29,120 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-09-24 19:24:29,121 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values
[2020-09-24 19:24:29,122 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-09-24 19:24:29,122 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-09-24 19:24:29,122 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
[2020-09-24 19:24:29,123 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values
[2020-09-24 19:24:29,125 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2020-09-24 19:24:29,126 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 19:24:29,179 INFO L113 SettingsManager]: Loading preferences was successful
[2020-09-24 19:24:29,179 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2020-09-24 19:24:29,182 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-09-24 19:24:29,182 INFO L138 SettingsManager]: * Create parallel compositions if possible=false
[2020-09-24 19:24:29,182 INFO L138 SettingsManager]: * Use SBE=true
[2020-09-24 19:24:29,182 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-09-24 19:24:29,183 INFO L138 SettingsManager]: * sizeof long=4
[2020-09-24 19:24:29,183 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2020-09-24 19:24:29,183 INFO L138 SettingsManager]: * sizeof POINTER=4
[2020-09-24 19:24:29,183 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2020-09-24 19:24:29,184 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2020-09-24 19:24:29,185 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-09-24 19:24:29,185 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2020-09-24 19:24:29,185 INFO L138 SettingsManager]: * sizeof long double=12
[2020-09-24 19:24:29,186 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2020-09-24 19:24:29,186 INFO L138 SettingsManager]: * Use constant arrays=true
[2020-09-24 19:24:29,186 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2020-09-24 19:24:29,186 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-09-24 19:24:29,186 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2020-09-24 19:24:29,187 INFO L138 SettingsManager]: * To the following directory=./dump/
[2020-09-24 19:24:29,187 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2020-09-24 19:24:29,187 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-24 19:24:29,187 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-09-24 19:24:29,187 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2020-09-24 19:24:29,188 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-09-24 19:24:29,188 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL
[2020-09-24 19:24:29,188 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-09-24 19:24:29,188 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-09-24 19:24:29,188 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE
[2020-09-24 19:24:29,189 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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true;
[2020-09-24 19:24:29,628 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2020-09-24 19:24:29,646 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-09-24 19:24:29,651 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-09-24 19:24:29,653 INFO L271 PluginConnector]: Initializing CDTParser...
[2020-09-24 19:24:29,653 INFO L275 PluginConnector]: CDTParser initialized
[2020-09-24 19:24:29,654 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-1.i
[2020-09-24 19:24:29,751 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/37491198e/07579b6a21b64a71b255869905663ff9/FLAG30198a7af
[2020-09-24 19:24:30,378 INFO L306 CDTParser]: Found 1 translation units.
[2020-09-24 19:24:30,379 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-1.i
[2020-09-24 19:24:30,397 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/37491198e/07579b6a21b64a71b255869905663ff9/FLAG30198a7af
[2020-09-24 19:24:30,646 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/37491198e/07579b6a21b64a71b255869905663ff9
[2020-09-24 19:24:30,662 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-09-24 19:24:30,667 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2020-09-24 19:24:30,670 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-09-24 19:24:30,670 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-09-24 19:24:30,676 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2020-09-24 19:24:30,678 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:24:30" (1/1) ...
[2020-09-24 19:24:30,682 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22589b7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:24:30, skipping insertion in model container
[2020-09-24 19:24:30,683 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:24:30" (1/1) ...
[2020-09-24 19:24:30,691 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2020-09-24 19:24:30,747 INFO L178 MainTranslator]: Built tables and reachable declarations
[2020-09-24 19:24:31,234 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-09-24 19:24:31,251 INFO L203 MainTranslator]: Completed pre-run
[2020-09-24 19:24:31,316 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-09-24 19:24:31,381 INFO L208 MainTranslator]: Completed translation
[2020-09-24 19:24:31,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:24:31 WrapperNode
[2020-09-24 19:24:31,384 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-09-24 19:24:31,385 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-09-24 19:24:31,385 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2020-09-24 19:24:31,385 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2020-09-24 19:24:31,401 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:24:31" (1/1) ...
[2020-09-24 19:24:31,401 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:24:31" (1/1) ...
[2020-09-24 19:24:31,421 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:24:31" (1/1) ...
[2020-09-24 19:24:31,421 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:24:31" (1/1) ...
[2020-09-24 19:24:31,446 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:24:31" (1/1) ...
[2020-09-24 19:24:31,455 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:24:31" (1/1) ...
[2020-09-24 19:24:31,460 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:24:31" (1/1) ...
[2020-09-24 19:24:31,467 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-09-24 19:24:31,468 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-09-24 19:24:31,468 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2020-09-24 19:24:31,468 INFO L275 PluginConnector]: RCFGBuilder initialized
[2020-09-24 19:24:31,469 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:24:31" (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 19:24:31,552 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-09-24 19:24:31,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-09-24 19:24:31,553 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32
[2020-09-24 19:24:31,553 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64
[2020-09-24 19:24:31,553 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit
[2020-09-24 19:24:31,554 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2020-09-24 19:24:31,554 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-09-24 19:24:31,554 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-09-24 19:24:31,554 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max
[2020-09-24 19:24:31,554 INFO L130 BoogieDeclarations]: Found specification of procedure atof
[2020-09-24 19:24:31,555 INFO L130 BoogieDeclarations]: Found specification of procedure atoi
[2020-09-24 19:24:31,555 INFO L130 BoogieDeclarations]: Found specification of procedure atol
[2020-09-24 19:24:31,555 INFO L130 BoogieDeclarations]: Found specification of procedure atoll
[2020-09-24 19:24:31,555 INFO L130 BoogieDeclarations]: Found specification of procedure strtod
[2020-09-24 19:24:31,555 INFO L130 BoogieDeclarations]: Found specification of procedure strtof
[2020-09-24 19:24:31,556 INFO L130 BoogieDeclarations]: Found specification of procedure strtold
[2020-09-24 19:24:31,556 INFO L130 BoogieDeclarations]: Found specification of procedure strtol
[2020-09-24 19:24:31,556 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul
[2020-09-24 19:24:31,556 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq
[2020-09-24 19:24:31,557 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq
[2020-09-24 19:24:31,557 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll
[2020-09-24 19:24:31,557 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull
[2020-09-24 19:24:31,557 INFO L130 BoogieDeclarations]: Found specification of procedure l64a
[2020-09-24 19:24:31,557 INFO L130 BoogieDeclarations]: Found specification of procedure a64l
[2020-09-24 19:24:31,557 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32
[2020-09-24 19:24:31,558 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64
[2020-09-24 19:24:31,558 INFO L130 BoogieDeclarations]: Found specification of procedure select
[2020-09-24 19:24:31,558 INFO L130 BoogieDeclarations]: Found specification of procedure pselect
[2020-09-24 19:24:31,558 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major
[2020-09-24 19:24:31,558 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor
[2020-09-24 19:24:31,559 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev
[2020-09-24 19:24:31,559 INFO L130 BoogieDeclarations]: Found specification of procedure random
[2020-09-24 19:24:31,559 INFO L130 BoogieDeclarations]: Found specification of procedure srandom
[2020-09-24 19:24:31,559 INFO L130 BoogieDeclarations]: Found specification of procedure initstate
[2020-09-24 19:24:31,559 INFO L130 BoogieDeclarations]: Found specification of procedure setstate
[2020-09-24 19:24:31,559 INFO L130 BoogieDeclarations]: Found specification of procedure random_r
[2020-09-24 19:24:31,560 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r
[2020-09-24 19:24:31,560 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r
[2020-09-24 19:24:31,560 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r
[2020-09-24 19:24:31,560 INFO L130 BoogieDeclarations]: Found specification of procedure rand
[2020-09-24 19:24:31,560 INFO L130 BoogieDeclarations]: Found specification of procedure srand
[2020-09-24 19:24:31,560 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r
[2020-09-24 19:24:31,561 INFO L130 BoogieDeclarations]: Found specification of procedure drand48
[2020-09-24 19:24:31,561 INFO L130 BoogieDeclarations]: Found specification of procedure erand48
[2020-09-24 19:24:31,561 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48
[2020-09-24 19:24:31,561 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48
[2020-09-24 19:24:31,561 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48
[2020-09-24 19:24:31,561 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48
[2020-09-24 19:24:31,561 INFO L130 BoogieDeclarations]: Found specification of procedure srand48
[2020-09-24 19:24:31,562 INFO L130 BoogieDeclarations]: Found specification of procedure seed48
[2020-09-24 19:24:31,562 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48
[2020-09-24 19:24:31,562 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r
[2020-09-24 19:24:31,562 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r
[2020-09-24 19:24:31,562 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r
[2020-09-24 19:24:31,563 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r
[2020-09-24 19:24:31,563 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r
[2020-09-24 19:24:31,563 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r
[2020-09-24 19:24:31,563 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r
[2020-09-24 19:24:31,563 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r
[2020-09-24 19:24:31,563 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r
[2020-09-24 19:24:31,564 INFO L130 BoogieDeclarations]: Found specification of procedure malloc
[2020-09-24 19:24:31,564 INFO L130 BoogieDeclarations]: Found specification of procedure calloc
[2020-09-24 19:24:31,564 INFO L130 BoogieDeclarations]: Found specification of procedure realloc
[2020-09-24 19:24:31,564 INFO L130 BoogieDeclarations]: Found specification of procedure free
[2020-09-24 19:24:31,564 INFO L130 BoogieDeclarations]: Found specification of procedure cfree
[2020-09-24 19:24:31,564 INFO L130 BoogieDeclarations]: Found specification of procedure alloca
[2020-09-24 19:24:31,564 INFO L130 BoogieDeclarations]: Found specification of procedure valloc
[2020-09-24 19:24:31,565 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign
[2020-09-24 19:24:31,565 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc
[2020-09-24 19:24:31,565 INFO L130 BoogieDeclarations]: Found specification of procedure abort
[2020-09-24 19:24:31,565 INFO L130 BoogieDeclarations]: Found specification of procedure atexit
[2020-09-24 19:24:31,565 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit
[2020-09-24 19:24:31,565 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit
[2020-09-24 19:24:31,566 INFO L130 BoogieDeclarations]: Found specification of procedure exit
[2020-09-24 19:24:31,566 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit
[2020-09-24 19:24:31,566 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit
[2020-09-24 19:24:31,566 INFO L130 BoogieDeclarations]: Found specification of procedure getenv
[2020-09-24 19:24:31,566 INFO L130 BoogieDeclarations]: Found specification of procedure putenv
[2020-09-24 19:24:31,567 INFO L130 BoogieDeclarations]: Found specification of procedure setenv
[2020-09-24 19:24:31,567 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv
[2020-09-24 19:24:31,567 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv
[2020-09-24 19:24:31,567 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp
[2020-09-24 19:24:31,567 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp
[2020-09-24 19:24:31,567 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps
[2020-09-24 19:24:31,568 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp
[2020-09-24 19:24:31,568 INFO L130 BoogieDeclarations]: Found specification of procedure system
[2020-09-24 19:24:31,568 INFO L130 BoogieDeclarations]: Found specification of procedure realpath
[2020-09-24 19:24:31,568 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch
[2020-09-24 19:24:31,568 INFO L130 BoogieDeclarations]: Found specification of procedure qsort
[2020-09-24 19:24:31,568 INFO L130 BoogieDeclarations]: Found specification of procedure abs
[2020-09-24 19:24:31,569 INFO L130 BoogieDeclarations]: Found specification of procedure labs
[2020-09-24 19:24:31,569 INFO L130 BoogieDeclarations]: Found specification of procedure llabs
[2020-09-24 19:24:31,569 INFO L130 BoogieDeclarations]: Found specification of procedure div
[2020-09-24 19:24:31,569 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv
[2020-09-24 19:24:31,569 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv
[2020-09-24 19:24:31,569 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt
[2020-09-24 19:24:31,569 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt
[2020-09-24 19:24:31,570 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt
[2020-09-24 19:24:31,570 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt
[2020-09-24 19:24:31,570 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt
[2020-09-24 19:24:31,570 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt
[2020-09-24 19:24:31,570 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r
[2020-09-24 19:24:31,570 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r
[2020-09-24 19:24:31,571 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r
[2020-09-24 19:24:31,571 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r
[2020-09-24 19:24:31,571 INFO L130 BoogieDeclarations]: Found specification of procedure mblen
[2020-09-24 19:24:31,571 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc
[2020-09-24 19:24:31,571 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb
[2020-09-24 19:24:31,571 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs
[2020-09-24 19:24:31,572 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs
[2020-09-24 19:24:31,572 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch
[2020-09-24 19:24:31,572 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt
[2020-09-24 19:24:31,572 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg
[2020-09-24 19:24:31,572 INFO L130 BoogieDeclarations]: Found specification of procedure myexit
[2020-09-24 19:24:31,572 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2020-09-24 19:24:31,573 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap
[2020-09-24 19:24:31,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$
[2020-09-24 19:24:31,573 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$
[2020-09-24 19:24:31,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2020-09-24 19:24:31,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~int
[2020-09-24 19:24:31,573 INFO L130 BoogieDeclarations]: Found specification of procedure read~int
[2020-09-24 19:24:31,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-09-24 19:24:31,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-09-24 19:24:31,962 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true;
[2020-09-24 19:24:32,349 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-09-24 19:24:32,349 INFO L295 CfgBuilder]: Removed 8 assume(true) statements.
[2020-09-24 19:24:32,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:24:32 BoogieIcfgContainer
[2020-09-24 19:24:32,356 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-09-24 19:24:32,358 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-09-24 19:24:32,358 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2020-09-24 19:24:32,363 INFO L275 PluginConnector]: TraceAbstraction initialized
[2020-09-24 19:24:32,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 07:24:30" (1/3) ...
[2020-09-24 19:24:32,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@183fc233 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:24:32, skipping insertion in model container
[2020-09-24 19:24:32,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:24:31" (2/3) ...
[2020-09-24 19:24:32,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@183fc233 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:24:32, skipping insertion in model container
[2020-09-24 19:24:32,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:24:32" (3/3) ...
[2020-09-24 19:24:32,369 INFO L109 eAbstractionObserver]: Analyzing ICFG list_and_tree_cnstr-1.i
[2020-09-24 19:24:32,382 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-09-24 19:24:32,395 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-09-24 19:24:32,423 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-09-24 19:24:32,459 INFO L375 AbstractCegarLoop]: Interprodecural is true
[2020-09-24 19:24:32,459 INFO L376 AbstractCegarLoop]: Hoare is true
[2020-09-24 19:24:32,459 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-09-24 19:24:32,460 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-09-24 19:24:32,460 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-09-24 19:24:32,460 INFO L380 AbstractCegarLoop]: Difference is false
[2020-09-24 19:24:32,460 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-09-24 19:24:32,460 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-09-24 19:24:32,505 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states.
[2020-09-24 19:24:32,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2020-09-24 19:24:32,518 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 19:24:32,519 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 19:24:32,520 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 19:24:32,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 19:24:32,529 INFO L82 PathProgramCache]: Analyzing trace with hash -652445128, now seen corresponding path program 1 times
[2020-09-24 19:24:32,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 19:24:32,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245502342]
[2020-09-24 19:24:32,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 19:24:32,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 19:24:32,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 19:24:32,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 19:24:32,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 19:24:32,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 19:24:33,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 19:24:33,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 19:24:33,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 19:24:33,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000
[2020-09-24 19:24:33,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38
[2020-09-24 19:24:33,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7
[2020-09-24 19:24:33,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 855
[2020-09-24 19:24:33,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST
[2020-09-24 19:24:33,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 19:24:33,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29
[2020-09-24 19:24:33,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 19:24:33,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4
[2020-09-24 19:24:33,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 19:24:33,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 19:24:33,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 19:24:33,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000
[2020-09-24 19:24:33,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 19:24:33,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 19:24:33,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13
[2020-09-24 19:24:33,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST
[2020-09-24 19:24:33,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 19:24:33,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 19:24:33,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 19:24:33,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 19:24:33,676 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 19:24:33,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1245502342]
[2020-09-24 19:24:33,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 19:24:33,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-09-24 19:24:33,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030556816]
[2020-09-24 19:24:33,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-09-24 19:24:33,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 19:24:33,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-09-24 19:24:33,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-09-24 19:24:33,717 INFO L87 Difference]: Start difference. First operand 177 states. Second operand 3 states.
[2020-09-24 19:24:34,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 19:24:34,225 INFO L93 Difference]: Finished difference Result 342 states and 400 transitions.
[2020-09-24 19:24:34,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2020-09-24 19:24:34,228 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31
[2020-09-24 19:24:34,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 19:24:34,250 INFO L225 Difference]: With dead ends: 342
[2020-09-24 19:24:34,251 INFO L226 Difference]: Without dead ends: 166
[2020-09-24 19:24:34,259 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-09-24 19:24:34,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states.
[2020-09-24 19:24:34,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166.
[2020-09-24 19:24:34,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states.
[2020-09-24 19:24:34,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 183 transitions.
[2020-09-24 19:24:34,359 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 183 transitions. Word has length 31
[2020-09-24 19:24:34,361 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 19:24:34,361 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 183 transitions.
[2020-09-24 19:24:34,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-09-24 19:24:34,361 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 183 transitions.
[2020-09-24 19:24:34,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42
[2020-09-24 19:24:34,371 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 19:24:34,371 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 19:24:34,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-09-24 19:24:34,372 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 19:24:34,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 19:24:34,374 INFO L82 PathProgramCache]: Analyzing trace with hash 473660712, now seen corresponding path program 1 times
[2020-09-24 19:24:34,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 19:24:34,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [979258432]
[2020-09-24 19:24:34,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 19:24:34,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 19:24:34,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 19:24:34,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 19:24:34,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000
[2020-09-24 19:24:34,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48
[2020-09-24 19:24:34,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-24 19:24:34,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 557
[2020-09-24 19:24:34,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST
[2020-09-24 19:24:34,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3
[2020-09-24 19:24:34,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14
[2020-09-24 19:24:34,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11
[2020-09-24 19:24:34,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 19:24:35,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 19:24:35,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 19:24:35,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 19:24:35,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000
[2020-09-24 19:24:35,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 19:24:35,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 19:24:35,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8
[2020-09-24 19:24:35,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST
[2020-09-24 19:24:35,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 19:24:35,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 19:24:35,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 19:24:35,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 19:24:35,040 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 19:24:35,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [979258432]
[2020-09-24 19:24:35,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 19:24:35,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-09-24 19:24:35,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199713238]
[2020-09-24 19:24:35,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-09-24 19:24:35,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 19:24:35,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-09-24 19:24:35,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-09-24 19:24:35,045 INFO L87 Difference]: Start difference. First operand 166 states and 183 transitions. Second operand 5 states.
[2020-09-24 19:24:35,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 19:24:35,355 INFO L93 Difference]: Finished difference Result 251 states and 277 transitions.
[2020-09-24 19:24:35,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states.
[2020-09-24 19:24:35,355 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41
[2020-09-24 19:24:35,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 19:24:35,360 INFO L225 Difference]: With dead ends: 251
[2020-09-24 19:24:35,360 INFO L226 Difference]: Without dead ends: 201
[2020-09-24 19:24:35,362 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-09-24 19:24:35,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states.
[2020-09-24 19:24:35,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200.
[2020-09-24 19:24:35,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states.
[2020-09-24 19:24:35,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 222 transitions.
[2020-09-24 19:24:35,378 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 222 transitions. Word has length 41
[2020-09-24 19:24:35,379 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 19:24:35,379 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 222 transitions.
[2020-09-24 19:24:35,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-09-24 19:24:35,379 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 222 transitions.
[2020-09-24 19:24:35,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55
[2020-09-24 19:24:35,381 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 19:24:35,382 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 19:24:35,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-09-24 19:24:35,382 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 19:24:35,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 19:24:35,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1870874818, now seen corresponding path program 1 times
[2020-09-24 19:24:35,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 19:24:35,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1880144574]
[2020-09-24 19:24:35,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 19:24:35,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 19:24:35,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 19:24:35,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 19:24:35,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 19:24:36,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000
[2020-09-24 19:24:36,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61
[2020-09-24 19:24:36,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3
[2020-09-24 19:24:36,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 906
[2020-09-24 19:24:36,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST
[2020-09-24 19:24:36,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-24 19:24:36,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29
[2020-09-24 19:24:36,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2
[2020-09-24 19:24:36,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 19:24:36,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 19:24:36,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 19:24:36,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 19:24:36,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000
[2020-09-24 19:24:36,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 19:24:36,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 19:24:36,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9
[2020-09-24 19:24:36,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST
[2020-09-24 19:24:36,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 19:24:36,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 19:24:36,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 19:24:36,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 19:24:36,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 19:24:36,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1880144574]
[2020-09-24 19:24:36,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 19:24:36,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-09-24 19:24:36,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163037522]
[2020-09-24 19:24:36,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-09-24 19:24:36,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 19:24:36,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-09-24 19:24:36,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-09-24 19:24:36,369 INFO L87 Difference]: Start difference. First operand 200 states and 222 transitions. Second operand 4 states.
[2020-09-24 19:24:36,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 19:24:36,636 INFO L93 Difference]: Finished difference Result 321 states and 359 transitions.
[2020-09-24 19:24:36,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states.
[2020-09-24 19:24:36,636 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54
[2020-09-24 19:24:36,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 19:24:36,638 INFO L225 Difference]: With dead ends: 321
[2020-09-24 19:24:36,639 INFO L226 Difference]: Without dead ends: 202
[2020-09-24 19:24:36,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-09-24 19:24:36,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states.
[2020-09-24 19:24:36,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202.
[2020-09-24 19:24:36,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states.
[2020-09-24 19:24:36,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 224 transitions.
[2020-09-24 19:24:36,681 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 224 transitions. Word has length 54
[2020-09-24 19:24:36,681 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 19:24:36,683 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 224 transitions.
[2020-09-24 19:24:36,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-09-24 19:24:36,683 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 224 transitions.
[2020-09-24 19:24:36,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57
[2020-09-24 19:24:36,686 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 19:24:36,686 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 19:24:36,686 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-09-24 19:24:36,686 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 19:24:36,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 19:24:36,689 INFO L82 PathProgramCache]: Analyzing trace with hash 129316031, now seen corresponding path program 1 times
[2020-09-24 19:24:36,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 19:24:36,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2102755922]
[2020-09-24 19:24:36,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 19:24:36,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 19:24:36,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 19:24:36,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000
[2020-09-24 19:24:36,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63
[2020-09-24 19:24:36,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 19:24:36,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 238
[2020-09-24 19:24:36,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST
[2020-09-24 19:24:36,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5
[2020-09-24 19:24:36,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44
[2020-09-24 19:24:36,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17
[2020-09-24 19:24:36,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 19:24:37,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 19:24:37,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 19:24:37,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 19:24:37,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000
[2020-09-24 19:24:37,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 19:24:37,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 19:24:37,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5
[2020-09-24 19:24:37,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST
[2020-09-24 19:24:37,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 19:24:37,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 19:24:37,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 19:24:37,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 19:24:37,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2020-09-24 19:24:37,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2102755922]
[2020-09-24 19:24:37,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 19:24:37,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2020-09-24 19:24:37,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182421069]
[2020-09-24 19:24:37,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-09-24 19:24:37,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 19:24:37,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-09-24 19:24:37,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2020-09-24 19:24:37,040 INFO L87 Difference]: Start difference. First operand 202 states and 224 transitions. Second operand 7 states.
[2020-09-24 19:24:37,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 19:24:37,514 INFO L93 Difference]: Finished difference Result 279 states and 306 transitions.
[2020-09-24 19:24:37,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states.
[2020-09-24 19:24:37,514 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56
[2020-09-24 19:24:37,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 19:24:37,521 INFO L225 Difference]: With dead ends: 279
[2020-09-24 19:24:37,521 INFO L226 Difference]: Without dead ends: 273
[2020-09-24 19:24:37,522 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 19:24:37,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states.
[2020-09-24 19:24:37,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 215.
[2020-09-24 19:24:37,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states.
[2020-09-24 19:24:37,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 240 transitions.
[2020-09-24 19:24:37,545 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 240 transitions. Word has length 56
[2020-09-24 19:24:37,546 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 19:24:37,547 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 240 transitions.
[2020-09-24 19:24:37,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-09-24 19:24:37,547 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 240 transitions.
[2020-09-24 19:24:37,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63
[2020-09-24 19:24:37,549 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 19:24:37,549 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 19:24:37,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-09-24 19:24:37,549 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 19:24:37,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 19:24:37,550 INFO L82 PathProgramCache]: Analyzing trace with hash 593034583, now seen corresponding path program 1 times
[2020-09-24 19:24:37,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 19:24:37,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566238661]
[2020-09-24 19:24:37,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 19:24:37,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 19:24:37,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 19:24:37,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000
[2020-09-24 19:24:37,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69
[2020-09-24 19:24:37,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 19:24:37,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 235
[2020-09-24 19:24:37,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST
[2020-09-24 19:24:37,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5
[2020-09-24 19:24:37,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44
[2020-09-24 19:24:37,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14
[2020-09-24 19:24:37,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 19:24:37,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 19:24:37,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 19:24:37,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 19:24:37,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000
[2020-09-24 19:24:37,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 19:24:37,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 19:24:37,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6
[2020-09-24 19:24:37,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST
[2020-09-24 19:24:37,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 19:24:37,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 19:24:37,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 19:24:37,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 19:24:37,907 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2020-09-24 19:24:37,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566238661]
[2020-09-24 19:24:37,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 19:24:37,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2020-09-24 19:24:37,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75692101]
[2020-09-24 19:24:37,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-09-24 19:24:37,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 19:24:37,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-09-24 19:24:37,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2020-09-24 19:24:37,910 INFO L87 Difference]: Start difference. First operand 215 states and 240 transitions. Second operand 7 states.
[2020-09-24 19:24:38,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 19:24:38,366 INFO L93 Difference]: Finished difference Result 282 states and 309 transitions.
[2020-09-24 19:24:38,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states.
[2020-09-24 19:24:38,367 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 62
[2020-09-24 19:24:38,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 19:24:38,369 INFO L225 Difference]: With dead ends: 282
[2020-09-24 19:24:38,369 INFO L226 Difference]: Without dead ends: 267
[2020-09-24 19:24:38,370 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 19:24:38,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states.
[2020-09-24 19:24:38,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 212.
[2020-09-24 19:24:38,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states.
[2020-09-24 19:24:38,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 236 transitions.
[2020-09-24 19:24:38,378 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 236 transitions. Word has length 62
[2020-09-24 19:24:38,379 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 19:24:38,379 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 236 transitions.
[2020-09-24 19:24:38,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-09-24 19:24:38,379 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 236 transitions.
[2020-09-24 19:24:38,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63
[2020-09-24 19:24:38,380 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 19:24:38,381 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 19:24:38,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-09-24 19:24:38,381 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 19:24:38,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 19:24:38,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1629716359, now seen corresponding path program 1 times
[2020-09-24 19:24:38,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 19:24:38,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [374615796]
[2020-09-24 19:24:38,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 19:24:38,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 19:24:38,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 19:24:38,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000
[2020-09-24 19:24:38,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69
[2020-09-24 19:24:38,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 19:24:38,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 197
[2020-09-24 19:24:38,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST
[2020-09-24 19:24:38,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5
[2020-09-24 19:24:38,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44
[2020-09-24 19:24:38,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11
[2020-09-24 19:24:38,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 19:24:38,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 19:24:38,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 19:24:38,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 19:24:38,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000
[2020-09-24 19:24:38,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 19:24:38,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 19:24:38,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3
[2020-09-24 19:24:38,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST
[2020-09-24 19:24:38,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 19:24:38,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 19:24:38,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 19:24:38,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 19:24:38,680 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2020-09-24 19:24:38,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [374615796]
[2020-09-24 19:24:38,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 19:24:38,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2020-09-24 19:24:38,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448587819]
[2020-09-24 19:24:38,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-09-24 19:24:38,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 19:24:38,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-09-24 19:24:38,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2020-09-24 19:24:38,683 INFO L87 Difference]: Start difference. First operand 212 states and 236 transitions. Second operand 7 states.
[2020-09-24 19:24:39,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 19:24:39,067 INFO L93 Difference]: Finished difference Result 264 states and 290 transitions.
[2020-09-24 19:24:39,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states.
[2020-09-24 19:24:39,071 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 62
[2020-09-24 19:24:39,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 19:24:39,073 INFO L225 Difference]: With dead ends: 264
[2020-09-24 19:24:39,073 INFO L226 Difference]: Without dead ends: 240
[2020-09-24 19:24:39,077 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 19:24:39,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states.
[2020-09-24 19:24:39,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 207.
[2020-09-24 19:24:39,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states.
[2020-09-24 19:24:39,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 230 transitions.
[2020-09-24 19:24:39,086 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 230 transitions. Word has length 62
[2020-09-24 19:24:39,086 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 19:24:39,086 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 230 transitions.
[2020-09-24 19:24:39,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-09-24 19:24:39,087 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 230 transitions.
[2020-09-24 19:24:39,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68
[2020-09-24 19:24:39,088 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 19:24:39,088 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, 1, 1, 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 19:24:39,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2020-09-24 19:24:39,089 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 19:24:39,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 19:24:39,089 INFO L82 PathProgramCache]: Analyzing trace with hash 852438762, now seen corresponding path program 1 times
[2020-09-24 19:24:39,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 19:24:39,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1349096671]
[2020-09-24 19:24:39,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 19:24:39,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 19:24:39,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 19:24:39,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 19:24:40,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000
[2020-09-24 19:24:40,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74
[2020-09-24 19:24:40,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-24 19:24:40,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1002
[2020-09-24 19:24:40,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST
[2020-09-24 19:24:40,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9
[2020-09-24 19:24:40,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44
[2020-09-24 19:24:40,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28
[2020-09-24 19:24:40,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 19:24:40,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 19:24:40,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 19:24:40,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 19:24:40,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000
[2020-09-24 19:24:40,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 19:24:40,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 19:24:40,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6
[2020-09-24 19:24:40,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST
[2020-09-24 19:24:40,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 19:24:40,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 19:24:40,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 19:24:40,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 19:24:40,393 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2020-09-24 19:24:40,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1349096671]
[2020-09-24 19:24:40,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 19:24:40,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11
[2020-09-24 19:24:40,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982629765]
[2020-09-24 19:24:40,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states
[2020-09-24 19:24:40,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 19:24:40,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2020-09-24 19:24:40,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2020-09-24 19:24:40,397 INFO L87 Difference]: Start difference. First operand 207 states and 230 transitions. Second operand 11 states.
[2020-09-24 19:24:41,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 19:24:41,072 INFO L93 Difference]: Finished difference Result 288 states and 315 transitions.
[2020-09-24 19:24:41,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states.
[2020-09-24 19:24:41,072 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 67
[2020-09-24 19:24:41,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 19:24:41,074 INFO L225 Difference]: With dead ends: 288
[2020-09-24 19:24:41,074 INFO L226 Difference]: Without dead ends: 282
[2020-09-24 19:24:41,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342
[2020-09-24 19:24:41,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states.
[2020-09-24 19:24:41,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 226.
[2020-09-24 19:24:41,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states.
[2020-09-24 19:24:41,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 251 transitions.
[2020-09-24 19:24:41,086 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 251 transitions. Word has length 67
[2020-09-24 19:24:41,087 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 19:24:41,087 INFO L479 AbstractCegarLoop]: Abstraction has 226 states and 251 transitions.
[2020-09-24 19:24:41,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states.
[2020-09-24 19:24:41,087 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 251 transitions.
[2020-09-24 19:24:41,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68
[2020-09-24 19:24:41,088 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 19:24:41,089 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, 1, 1, 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 19:24:41,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6
[2020-09-24 19:24:41,089 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 19:24:41,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 19:24:41,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1742912072, now seen corresponding path program 1 times
[2020-09-24 19:24:41,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 19:24:41,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081456193]
[2020-09-24 19:24:41,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 19:24:41,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 19:24:41,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 19:24:41,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 19:24:42,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000
[2020-09-24 19:24:42,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74
[2020-09-24 19:24:42,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-24 19:24:42,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1009
[2020-09-24 19:24:42,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST
[2020-09-24 19:24:42,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9
[2020-09-24 19:24:42,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44
[2020-09-24 19:24:42,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28
[2020-09-24 19:24:42,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 19:24:42,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 19:24:42,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 19:24:42,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 19:24:42,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000
[2020-09-24 19:24:42,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 19:24:42,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 19:24:42,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6
[2020-09-24 19:24:42,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST
[2020-09-24 19:24:42,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 19:24:42,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 19:24:42,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 19:24:42,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 19:24:42,284 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2020-09-24 19:24:42,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081456193]
[2020-09-24 19:24:42,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 19:24:42,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11
[2020-09-24 19:24:42,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748395202]
[2020-09-24 19:24:42,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states
[2020-09-24 19:24:42,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 19:24:42,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2020-09-24 19:24:42,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2020-09-24 19:24:42,287 INFO L87 Difference]: Start difference. First operand 226 states and 251 transitions. Second operand 11 states.
[2020-09-24 19:24:43,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 19:24:43,149 INFO L93 Difference]: Finished difference Result 304 states and 334 transitions.
[2020-09-24 19:24:43,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states.
[2020-09-24 19:24:43,150 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 67
[2020-09-24 19:24:43,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 19:24:43,152 INFO L225 Difference]: With dead ends: 304
[2020-09-24 19:24:43,152 INFO L226 Difference]: Without dead ends: 298
[2020-09-24 19:24:43,153 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342
[2020-09-24 19:24:43,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states.
[2020-09-24 19:24:43,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 238.
[2020-09-24 19:24:43,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states.
[2020-09-24 19:24:43,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 264 transitions.
[2020-09-24 19:24:43,162 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 264 transitions. Word has length 67
[2020-09-24 19:24:43,162 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 19:24:43,162 INFO L479 AbstractCegarLoop]: Abstraction has 238 states and 264 transitions.
[2020-09-24 19:24:43,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states.
[2020-09-24 19:24:43,162 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 264 transitions.
[2020-09-24 19:24:43,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74
[2020-09-24 19:24:43,164 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 19:24:43,164 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 19:24:43,164 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7
[2020-09-24 19:24:43,164 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 19:24:43,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 19:24:43,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1875154110, now seen corresponding path program 1 times
[2020-09-24 19:24:43,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 19:24:43,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670346847]
[2020-09-24 19:24:43,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 19:24:43,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 19:24:43,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 19:24:43,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 19:24:44,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000
[2020-09-24 19:24:44,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80
[2020-09-24 19:24:44,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-24 19:24:44,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 999
[2020-09-24 19:24:44,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST
[2020-09-24 19:24:44,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7
[2020-09-24 19:24:44,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44
[2020-09-24 19:24:44,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25
[2020-09-24 19:24:44,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 19:24:44,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 19:24:44,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 19:24:44,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 19:24:44,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000
[2020-09-24 19:24:44,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 19:24:44,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 19:24:44,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5
[2020-09-24 19:24:44,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST
[2020-09-24 19:24:44,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 19:24:44,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 19:24:44,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 19:24:44,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 19:24:44,298 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2020-09-24 19:24:44,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1670346847]
[2020-09-24 19:24:44,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 19:24:44,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9
[2020-09-24 19:24:44,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449662986]
[2020-09-24 19:24:44,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states
[2020-09-24 19:24:44,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 19:24:44,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2020-09-24 19:24:44,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72
[2020-09-24 19:24:44,301 INFO L87 Difference]: Start difference. First operand 238 states and 264 transitions. Second operand 9 states.
[2020-09-24 19:24:44,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 19:24:44,850 INFO L93 Difference]: Finished difference Result 305 states and 335 transitions.
[2020-09-24 19:24:44,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states.
[2020-09-24 19:24:44,850 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 73
[2020-09-24 19:24:44,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 19:24:44,855 INFO L225 Difference]: With dead ends: 305
[2020-09-24 19:24:44,855 INFO L226 Difference]: Without dead ends: 290
[2020-09-24 19:24:44,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156
[2020-09-24 19:24:44,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states.
[2020-09-24 19:24:44,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 245.
[2020-09-24 19:24:44,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states.
[2020-09-24 19:24:44,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 272 transitions.
[2020-09-24 19:24:44,866 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 272 transitions. Word has length 73
[2020-09-24 19:24:44,867 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 19:24:44,867 INFO L479 AbstractCegarLoop]: Abstraction has 245 states and 272 transitions.
[2020-09-24 19:24:44,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states.
[2020-09-24 19:24:44,867 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 272 transitions.
[2020-09-24 19:24:44,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74
[2020-09-24 19:24:44,874 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 19:24:44,874 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 19:24:44,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8
[2020-09-24 19:24:44,874 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 19:24:44,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 19:24:44,875 INFO L82 PathProgramCache]: Analyzing trace with hash -838472334, now seen corresponding path program 1 times
[2020-09-24 19:24:44,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 19:24:44,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [193692243]
[2020-09-24 19:24:44,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 19:24:44,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 19:24:44,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 19:24:45,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000
[2020-09-24 19:24:45,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80
[2020-09-24 19:24:45,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 19:24:45,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 745
[2020-09-24 19:24:45,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST
[2020-09-24 19:24:45,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14
[2020-09-24 19:24:45,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40
[2020-09-24 19:24:45,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38
[2020-09-24 19:24:45,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 19:24:45,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 19:24:45,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 19:24:45,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 19:24:45,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000
[2020-09-24 19:24:45,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 19:24:45,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 19:24:45,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6
[2020-09-24 19:24:45,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST
[2020-09-24 19:24:45,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 19:24:45,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 19:24:45,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 19:24:45,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 19:24:45,918 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2020-09-24 19:24:45,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [193692243]
[2020-09-24 19:24:45,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 19:24:45,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16
[2020-09-24 19:24:45,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799836643]
[2020-09-24 19:24:45,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states
[2020-09-24 19:24:45,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 19:24:45,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2020-09-24 19:24:45,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240
[2020-09-24 19:24:45,921 INFO L87 Difference]: Start difference. First operand 245 states and 272 transitions. Second operand 16 states.
[2020-09-24 19:24:47,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 19:24:47,381 INFO L93 Difference]: Finished difference Result 310 states and 340 transitions.
[2020-09-24 19:24:47,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states.
[2020-09-24 19:24:47,381 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 73
[2020-09-24 19:24:47,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 19:24:47,383 INFO L225 Difference]: With dead ends: 310
[2020-09-24 19:24:47,383 INFO L226 Difference]: Without dead ends: 304
[2020-09-24 19:24:47,384 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 19:24:47,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states.
[2020-09-24 19:24:47,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 249.
[2020-09-24 19:24:47,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states.
[2020-09-24 19:24:47,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 276 transitions.
[2020-09-24 19:24:47,393 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 276 transitions. Word has length 73
[2020-09-24 19:24:47,393 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 19:24:47,394 INFO L479 AbstractCegarLoop]: Abstraction has 249 states and 276 transitions.
[2020-09-24 19:24:47,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states.
[2020-09-24 19:24:47,394 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 276 transitions.
[2020-09-24 19:24:47,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74
[2020-09-24 19:24:47,395 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 19:24:47,395 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 19:24:47,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9
[2020-09-24 19:24:47,396 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 19:24:47,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 19:24:47,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1654345840, now seen corresponding path program 1 times
[2020-09-24 19:24:47,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 19:24:47,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [819300117]
[2020-09-24 19:24:47,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 19:24:47,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 19:24:47,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 19:24:48,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000
[2020-09-24 19:24:48,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80
[2020-09-24 19:24:48,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 19:24:48,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 701
[2020-09-24 19:24:48,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST
[2020-09-24 19:24:48,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14
[2020-09-24 19:24:48,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40
[2020-09-24 19:24:48,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38
[2020-09-24 19:24:48,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 19:24:48,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 19:24:48,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 19:24:48,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 19:24:48,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000
[2020-09-24 19:24:48,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 19:24:48,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 19:24:48,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7
[2020-09-24 19:24:48,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST
[2020-09-24 19:24:48,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 19:24:48,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 19:24:48,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 19:24:48,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 19:24:48,579 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2020-09-24 19:24:48,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [819300117]
[2020-09-24 19:24:48,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 19:24:48,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16
[2020-09-24 19:24:48,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257672573]
[2020-09-24 19:24:48,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states
[2020-09-24 19:24:48,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 19:24:48,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2020-09-24 19:24:48,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240
[2020-09-24 19:24:48,582 INFO L87 Difference]: Start difference. First operand 249 states and 276 transitions. Second operand 16 states.
[2020-09-24 19:24:50,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 19:24:50,035 INFO L93 Difference]: Finished difference Result 324 states and 354 transitions.
[2020-09-24 19:24:50,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states.
[2020-09-24 19:24:50,036 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 73
[2020-09-24 19:24:50,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 19:24:50,038 INFO L225 Difference]: With dead ends: 324
[2020-09-24 19:24:50,038 INFO L226 Difference]: Without dead ends: 318
[2020-09-24 19:24:50,039 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992
[2020-09-24 19:24:50,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states.
[2020-09-24 19:24:50,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 258.
[2020-09-24 19:24:50,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states.
[2020-09-24 19:24:50,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 286 transitions.
[2020-09-24 19:24:50,049 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 286 transitions. Word has length 73
[2020-09-24 19:24:50,049 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 19:24:50,050 INFO L479 AbstractCegarLoop]: Abstraction has 258 states and 286 transitions.
[2020-09-24 19:24:50,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states.
[2020-09-24 19:24:50,050 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 286 transitions.
[2020-09-24 19:24:50,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74
[2020-09-24 19:24:50,051 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 19:24:50,051 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 19:24:50,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10
[2020-09-24 19:24:50,052 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 19:24:50,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 19:24:50,052 INFO L82 PathProgramCache]: Analyzing trace with hash -617664064, now seen corresponding path program 1 times
[2020-09-24 19:24:50,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 19:24:50,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [704858113]
[2020-09-24 19:24:50,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 19:24:50,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 19:24:50,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 19:24:50,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 19:24:51,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000
[2020-09-24 19:24:51,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80
[2020-09-24 19:24:51,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-24 19:24:51,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1004
[2020-09-24 19:24:51,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST
[2020-09-24 19:24:51,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7
[2020-09-24 19:24:51,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44
[2020-09-24 19:24:51,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22
[2020-09-24 19:24:51,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 19:24:51,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 19:24:51,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 19:24:51,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 19:24:51,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000
[2020-09-24 19:24:51,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 19:24:51,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 19:24:51,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5
[2020-09-24 19:24:51,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST
[2020-09-24 19:24:51,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 19:24:51,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 19:24:51,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 19:24:51,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 19:24:51,187 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2020-09-24 19:24:51,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [704858113]
[2020-09-24 19:24:51,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 19:24:51,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9
[2020-09-24 19:24:51,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441311847]
[2020-09-24 19:24:51,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states
[2020-09-24 19:24:51,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 19:24:51,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2020-09-24 19:24:51,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72
[2020-09-24 19:24:51,189 INFO L87 Difference]: Start difference. First operand 258 states and 286 transitions. Second operand 9 states.
[2020-09-24 19:24:51,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 19:24:51,688 INFO L93 Difference]: Finished difference Result 316 states and 346 transitions.
[2020-09-24 19:24:51,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states.
[2020-09-24 19:24:51,689 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 73
[2020-09-24 19:24:51,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 19:24:51,692 INFO L225 Difference]: With dead ends: 316
[2020-09-24 19:24:51,692 INFO L226 Difference]: Without dead ends: 297
[2020-09-24 19:24:51,693 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156
[2020-09-24 19:24:51,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states.
[2020-09-24 19:24:51,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 258.
[2020-09-24 19:24:51,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states.
[2020-09-24 19:24:51,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 285 transitions.
[2020-09-24 19:24:51,701 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 285 transitions. Word has length 73
[2020-09-24 19:24:51,702 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 19:24:51,702 INFO L479 AbstractCegarLoop]: Abstraction has 258 states and 285 transitions.
[2020-09-24 19:24:51,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states.
[2020-09-24 19:24:51,702 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 285 transitions.
[2020-09-24 19:24:51,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79
[2020-09-24 19:24:51,703 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 19:24:51,703 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, 1, 1, 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 19:24:51,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11
[2020-09-24 19:24:51,704 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 19:24:51,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 19:24:51,704 INFO L82 PathProgramCache]: Analyzing trace with hash 342604767, now seen corresponding path program 2 times
[2020-09-24 19:24:51,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 19:24:51,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1207972664]
[2020-09-24 19:24:51,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 19:24:51,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 19:24:51,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 19:24:52,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 19:24:52,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000
[2020-09-24 19:24:52,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85
[2020-09-24 19:24:52,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-24 19:24:52,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1015
[2020-09-24 19:24:52,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST
[2020-09-24 19:24:52,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17
[2020-09-24 19:24:52,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40
[2020-09-24 19:24:52,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43
[2020-09-24 19:24:52,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 19:24:53,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 19:24:53,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 19:24:53,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 19:24:53,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000
[2020-09-24 19:24:53,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 19:24:53,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 19:24:53,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29
[2020-09-24 19:24:53,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST
[2020-09-24 19:24:53,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 19:24:53,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 19:24:53,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 19:24:53,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 19:24:53,146 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2020-09-24 19:24:53,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1207972664]
[2020-09-24 19:24:53,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 19:24:53,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18
[2020-09-24 19:24:53,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169926619]
[2020-09-24 19:24:53,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states
[2020-09-24 19:24:53,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 19:24:53,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants.
[2020-09-24 19:24:53,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306
[2020-09-24 19:24:53,151 INFO L87 Difference]: Start difference. First operand 258 states and 285 transitions. Second operand 18 states.
[2020-09-24 19:24:54,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 19:24:54,611 INFO L93 Difference]: Finished difference Result 352 states and 384 transitions.
[2020-09-24 19:24:54,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states.
[2020-09-24 19:24:54,615 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 78
[2020-09-24 19:24:54,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 19:24:54,617 INFO L225 Difference]: With dead ends: 352
[2020-09-24 19:24:54,617 INFO L226 Difference]: Without dead ends: 346
[2020-09-24 19:24:54,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=406, Invalid=1486, Unknown=0, NotChecked=0, Total=1892
[2020-09-24 19:24:54,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states.
[2020-09-24 19:24:54,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 272.
[2020-09-24 19:24:54,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states.
[2020-09-24 19:24:54,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 300 transitions.
[2020-09-24 19:24:54,630 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 300 transitions. Word has length 78
[2020-09-24 19:24:54,630 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 19:24:54,630 INFO L479 AbstractCegarLoop]: Abstraction has 272 states and 300 transitions.
[2020-09-24 19:24:54,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states.
[2020-09-24 19:24:54,630 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 300 transitions.
[2020-09-24 19:24:54,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79
[2020-09-24 19:24:54,631 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 19:24:54,632 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, 1, 1, 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 19:24:54,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12
[2020-09-24 19:24:54,632 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 19:24:54,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 19:24:54,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1736898641, now seen corresponding path program 1 times
[2020-09-24 19:24:54,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 19:24:54,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1742118351]
[2020-09-24 19:24:54,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 19:24:54,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 19:24:54,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 19:24:54,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 19:24:55,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000
[2020-09-24 19:24:55,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85
[2020-09-24 19:24:55,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-24 19:24:55,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1000
[2020-09-24 19:24:55,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST
[2020-09-24 19:24:55,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17
[2020-09-24 19:24:55,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40
[2020-09-24 19:24:55,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43
[2020-09-24 19:24:55,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 19:24:55,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 19:24:55,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 19:24:55,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 19:24:55,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000
[2020-09-24 19:24:55,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 19:24:55,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 19:24:55,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5
[2020-09-24 19:24:55,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST
[2020-09-24 19:24:55,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 19:24:55,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 19:24:55,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 19:24:55,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 19:24:55,935 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2020-09-24 19:24:55,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1742118351]
[2020-09-24 19:24:55,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 19:24:55,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18
[2020-09-24 19:24:55,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291911174]
[2020-09-24 19:24:55,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states
[2020-09-24 19:24:55,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 19:24:55,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants.
[2020-09-24 19:24:55,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306
[2020-09-24 19:24:55,937 INFO L87 Difference]: Start difference. First operand 272 states and 300 transitions. Second operand 18 states.
[2020-09-24 19:24:57,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 19:24:57,516 INFO L93 Difference]: Finished difference Result 378 states and 412 transitions.
[2020-09-24 19:24:57,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states.
[2020-09-24 19:24:57,517 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 78
[2020-09-24 19:24:57,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 19:24:57,519 INFO L225 Difference]: With dead ends: 378
[2020-09-24 19:24:57,519 INFO L226 Difference]: Without dead ends: 372
[2020-09-24 19:24:57,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=406, Invalid=1486, Unknown=0, NotChecked=0, Total=1892
[2020-09-24 19:24:57,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states.
[2020-09-24 19:24:57,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 284.
[2020-09-24 19:24:57,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states.
[2020-09-24 19:24:57,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 313 transitions.
[2020-09-24 19:24:57,531 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 313 transitions. Word has length 78
[2020-09-24 19:24:57,531 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 19:24:57,531 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 313 transitions.
[2020-09-24 19:24:57,531 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states.
[2020-09-24 19:24:57,531 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 313 transitions.
[2020-09-24 19:24:57,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80
[2020-09-24 19:24:57,532 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 19:24:57,533 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 19:24:57,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13
[2020-09-24 19:24:57,533 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 19:24:57,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 19:24:57,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1698374602, now seen corresponding path program 1 times
[2020-09-24 19:24:57,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 19:24:57,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [883399870]
[2020-09-24 19:24:57,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 19:24:57,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 19:24:57,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 19:24:58,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000
[2020-09-24 19:24:58,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86
[2020-09-24 19:24:58,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 19:24:58,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 721
[2020-09-24 19:24:58,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST
[2020-09-24 19:24:58,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14
[2020-09-24 19:24:58,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40
[2020-09-24 19:24:58,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35
[2020-09-24 19:24:58,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 19:24:58,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 19:24:58,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 19:24:58,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 19:24:58,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000
[2020-09-24 19:24:58,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 19:24:58,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 19:24:58,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4
[2020-09-24 19:24:58,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST
[2020-09-24 19:24:58,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 19:24:58,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 19:24:58,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 19:24:58,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 19:24:58,588 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2020-09-24 19:24:58,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [883399870]
[2020-09-24 19:24:58,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 19:24:58,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16
[2020-09-24 19:24:58,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776787915]
[2020-09-24 19:24:58,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states
[2020-09-24 19:24:58,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 19:24:58,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2020-09-24 19:24:58,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240
[2020-09-24 19:24:58,590 INFO L87 Difference]: Start difference. First operand 284 states and 313 transitions. Second operand 16 states.
[2020-09-24 19:25:00,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 19:25:00,051 INFO L93 Difference]: Finished difference Result 350 states and 382 transitions.
[2020-09-24 19:25:00,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states.
[2020-09-24 19:25:00,052 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79
[2020-09-24 19:25:00,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 19:25:00,054 INFO L225 Difference]: With dead ends: 350
[2020-09-24 19:25:00,054 INFO L226 Difference]: Without dead ends: 335
[2020-09-24 19:25:00,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=203, Invalid=987, Unknown=0, NotChecked=0, Total=1190
[2020-09-24 19:25:00,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states.
[2020-09-24 19:25:00,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 286.
[2020-09-24 19:25:00,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states.
[2020-09-24 19:25:00,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 315 transitions.
[2020-09-24 19:25:00,065 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 315 transitions. Word has length 79
[2020-09-24 19:25:00,065 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 19:25:00,065 INFO L479 AbstractCegarLoop]: Abstraction has 286 states and 315 transitions.
[2020-09-24 19:25:00,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states.
[2020-09-24 19:25:00,066 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 315 transitions.
[2020-09-24 19:25:00,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80
[2020-09-24 19:25:00,067 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 19:25:00,067 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, 1, 1, 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 19:25:00,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14
[2020-09-24 19:25:00,068 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 19:25:00,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 19:25:00,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1559910918, now seen corresponding path program 2 times
[2020-09-24 19:25:00,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 19:25:00,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1061368457]
[2020-09-24 19:25:00,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 19:25:00,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 19:25:00,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 19:25:00,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000
[2020-09-24 19:25:00,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86
[2020-09-24 19:25:00,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 19:25:00,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 687
[2020-09-24 19:25:00,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST
[2020-09-24 19:25:00,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14
[2020-09-24 19:25:00,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40
[2020-09-24 19:25:00,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32
[2020-09-24 19:25:00,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 19:25:01,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 19:25:01,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 19:25:01,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 19:25:01,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000
[2020-09-24 19:25:01,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 19:25:01,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 19:25:01,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13
[2020-09-24 19:25:01,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST
[2020-09-24 19:25:01,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 19:25:01,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 19:25:01,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 19:25:01,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3
[2020-09-24 19:25:01,170 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2020-09-24 19:25:01,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1061368457]
[2020-09-24 19:25:01,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 19:25:01,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16
[2020-09-24 19:25:01,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906465397]
[2020-09-24 19:25:01,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states
[2020-09-24 19:25:01,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 19:25:01,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2020-09-24 19:25:01,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240
[2020-09-24 19:25:01,178 INFO L87 Difference]: Start difference. First operand 286 states and 315 transitions. Second operand 16 states.
[2020-09-24 19:25:02,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 19:25:02,533 INFO L93 Difference]: Finished difference Result 330 states and 361 transitions.
[2020-09-24 19:25:02,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states.
[2020-09-24 19:25:02,534 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79
[2020-09-24 19:25:02,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 19:25:02,536 INFO L225 Difference]: With dead ends: 330
[2020-09-24 19:25:02,536 INFO L226 Difference]: Without dead ends: 300
[2020-09-24 19:25:02,538 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930
[2020-09-24 19:25:02,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states.
[2020-09-24 19:25:02,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 275.
[2020-09-24 19:25:02,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states.
[2020-09-24 19:25:02,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 303 transitions.
[2020-09-24 19:25:02,547 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 303 transitions. Word has length 79
[2020-09-24 19:25:02,547 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 19:25:02,547 INFO L479 AbstractCegarLoop]: Abstraction has 275 states and 303 transitions.
[2020-09-24 19:25:02,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states.
[2020-09-24 19:25:02,548 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 303 transitions.
[2020-09-24 19:25:02,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80
[2020-09-24 19:25:02,549 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 19:25:02,551 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, 1, 1, 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 19:25:02,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15
[2020-09-24 19:25:02,551 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 19:25:02,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 19:25:02,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1643861864, now seen corresponding path program 2 times
[2020-09-24 19:25:02,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 19:25:02,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [231458063]
[2020-09-24 19:25:02,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 19:25:02,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 19:25:02,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 19:25:03,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000
[2020-09-24 19:25:03,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86
[2020-09-24 19:25:03,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 19:25:03,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 690
[2020-09-24 19:25:03,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST
[2020-09-24 19:25:03,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14
[2020-09-24 19:25:03,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40
[2020-09-24 19:25:03,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35
[2020-09-24 19:25:03,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 19:25:03,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 19:25:03,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 19:25:03,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 19:25:03,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000
[2020-09-24 19:25:03,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 19:25:03,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 19:25:03,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6
[2020-09-24 19:25:03,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST
[2020-09-24 19:25:03,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 19:25:03,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 19:25:03,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 19:25:03,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 19:25:03,671 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2020-09-24 19:25:03,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [231458063]
[2020-09-24 19:25:03,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 19:25:03,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16
[2020-09-24 19:25:03,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484180736]
[2020-09-24 19:25:03,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states
[2020-09-24 19:25:03,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 19:25:03,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2020-09-24 19:25:03,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240
[2020-09-24 19:25:03,675 INFO L87 Difference]: Start difference. First operand 275 states and 303 transitions. Second operand 16 states.
[2020-09-24 19:25:05,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 19:25:05,021 INFO L93 Difference]: Finished difference Result 314 states and 343 transitions.
[2020-09-24 19:25:05,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states.
[2020-09-24 19:25:05,021 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79
[2020-09-24 19:25:05,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 19:25:05,024 INFO L225 Difference]: With dead ends: 314
[2020-09-24 19:25:05,024 INFO L226 Difference]: Without dead ends: 288
[2020-09-24 19:25:05,027 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=181, Invalid=875, Unknown=0, NotChecked=0, Total=1056
[2020-09-24 19:25:05,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states.
[2020-09-24 19:25:05,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 261.
[2020-09-24 19:25:05,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states.
[2020-09-24 19:25:05,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 288 transitions.
[2020-09-24 19:25:05,038 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 288 transitions. Word has length 79
[2020-09-24 19:25:05,038 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 19:25:05,038 INFO L479 AbstractCegarLoop]: Abstraction has 261 states and 288 transitions.
[2020-09-24 19:25:05,039 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states.
[2020-09-24 19:25:05,039 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 288 transitions.
[2020-09-24 19:25:05,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85
[2020-09-24 19:25:05,044 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 19:25:05,044 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, 1, 1, 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 19:25:05,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16
[2020-09-24 19:25:05,045 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 19:25:05,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 19:25:05,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1435872375, now seen corresponding path program 2 times
[2020-09-24 19:25:05,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 19:25:05,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [185977775]
[2020-09-24 19:25:05,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 19:25:05,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 19:25:05,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 19:25:05,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 19:25:06,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000
[2020-09-24 19:25:06,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91
[2020-09-24 19:25:06,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-24 19:25:06,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1003
[2020-09-24 19:25:06,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST
[2020-09-24 19:25:06,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15
[2020-09-24 19:25:06,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40
[2020-09-24 19:25:06,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40
[2020-09-24 19:25:06,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 19:25:06,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 19:25:06,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 19:25:06,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 19:25:06,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000
[2020-09-24 19:25:06,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 19:25:06,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 19:25:06,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4
[2020-09-24 19:25:06,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST
[2020-09-24 19:25:06,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 19:25:06,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 19:25:06,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 19:25:06,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 19:25:06,359 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2020-09-24 19:25:06,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [185977775]
[2020-09-24 19:25:06,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 19:25:06,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16
[2020-09-24 19:25:06,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330183383]
[2020-09-24 19:25:06,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states
[2020-09-24 19:25:06,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 19:25:06,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2020-09-24 19:25:06,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240
[2020-09-24 19:25:06,368 INFO L87 Difference]: Start difference. First operand 261 states and 288 transitions. Second operand 16 states.
[2020-09-24 19:25:07,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 19:25:07,569 INFO L93 Difference]: Finished difference Result 339 states and 370 transitions.
[2020-09-24 19:25:07,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states.
[2020-09-24 19:25:07,570 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 84
[2020-09-24 19:25:07,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 19:25:07,572 INFO L225 Difference]: With dead ends: 339
[2020-09-24 19:25:07,572 INFO L226 Difference]: Without dead ends: 324
[2020-09-24 19:25:07,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=268, Invalid=788, Unknown=0, NotChecked=0, Total=1056
[2020-09-24 19:25:07,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states.
[2020-09-24 19:25:07,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 279.
[2020-09-24 19:25:07,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states.
[2020-09-24 19:25:07,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 307 transitions.
[2020-09-24 19:25:07,583 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 307 transitions. Word has length 84
[2020-09-24 19:25:07,583 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 19:25:07,583 INFO L479 AbstractCegarLoop]: Abstraction has 279 states and 307 transitions.
[2020-09-24 19:25:07,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states.
[2020-09-24 19:25:07,583 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 307 transitions.
[2020-09-24 19:25:07,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85
[2020-09-24 19:25:07,585 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 19:25:07,585 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, 1, 1, 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 19:25:07,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17
[2020-09-24 19:25:07,585 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 19:25:07,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 19:25:07,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1822413145, now seen corresponding path program 3 times
[2020-09-24 19:25:07,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 19:25:07,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [660180077]
[2020-09-24 19:25:07,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 19:25:07,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 19:25:07,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 19:25:08,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000
[2020-09-24 19:25:08,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91
[2020-09-24 19:25:08,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 19:25:08,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1014
[2020-09-24 19:25:08,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST
[2020-09-24 19:25:08,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20
[2020-09-24 19:25:08,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40
[2020-09-24 19:25:08,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43
[2020-09-24 19:25:08,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 19:25:09,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 19:25:09,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 19:25:09,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 19:25:09,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000
[2020-09-24 19:25:09,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 19:25:09,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 19:25:09,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11
[2020-09-24 19:25:09,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST
[2020-09-24 19:25:09,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 19:25:09,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 19:25:09,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 19:25:09,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 19:25:09,242 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2020-09-24 19:25:09,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [660180077]
[2020-09-24 19:25:09,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 19:25:09,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22
[2020-09-24 19:25:09,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280352272]
[2020-09-24 19:25:09,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states
[2020-09-24 19:25:09,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 19:25:09,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants.
[2020-09-24 19:25:09,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462
[2020-09-24 19:25:09,245 INFO L87 Difference]: Start difference. First operand 279 states and 307 transitions. Second operand 22 states.
[2020-09-24 19:25:11,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 19:25:11,415 INFO L93 Difference]: Finished difference Result 352 states and 384 transitions.
[2020-09-24 19:25:11,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states.
[2020-09-24 19:25:11,416 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 84
[2020-09-24 19:25:11,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 19:25:11,418 INFO L225 Difference]: With dead ends: 352
[2020-09-24 19:25:11,418 INFO L226 Difference]: Without dead ends: 339
[2020-09-24 19:25:11,419 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=372, Invalid=2078, Unknown=0, NotChecked=0, Total=2450
[2020-09-24 19:25:11,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states.
[2020-09-24 19:25:11,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 285.
[2020-09-24 19:25:11,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states.
[2020-09-24 19:25:11,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 313 transitions.
[2020-09-24 19:25:11,430 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 313 transitions. Word has length 84
[2020-09-24 19:25:11,430 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-09-24 19:25:11,431 INFO L479 AbstractCegarLoop]: Abstraction has 285 states and 313 transitions.
[2020-09-24 19:25:11,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states.
[2020-09-24 19:25:11,431 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 313 transitions.
[2020-09-24 19:25:11,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85
[2020-09-24 19:25:11,432 INFO L414 BasicCegarLoop]: Found error trace
[2020-09-24 19:25:11,432 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, 1, 1, 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 19:25:11,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18
[2020-09-24 19:25:11,433 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 19:25:11,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 19:25:11,433 INFO L82 PathProgramCache]: Analyzing trace with hash 752503657, now seen corresponding path program 1 times
[2020-09-24 19:25:11,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 19:25:11,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [573725066]
[2020-09-24 19:25:11,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 19:25:11,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-09-24 19:25:11,460 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2020-09-24 19:25:11,460 INFO L520 BasicCegarLoop]: Counterexample might be feasible
[2020-09-24 19:25:11,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19
[2020-09-24 19:25:11,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 07:25:11 BoogieIcfgContainer
[2020-09-24 19:25:11,491 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-09-24 19:25:11,494 INFO L168 Benchmark]: Toolchain (without parser) took 40829.48 ms. Allocated memory was 147.8 MB in the beginning and 505.4 MB in the end (delta: 357.6 MB). Free memory was 102.9 MB in the beginning and 159.8 MB in the end (delta: -56.9 MB). Peak memory consumption was 300.6 MB. Max. memory is 7.1 GB.
[2020-09-24 19:25:11,495 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 147.8 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
[2020-09-24 19:25:11,496 INFO L168 Benchmark]: CACSL2BoogieTranslator took 714.18 ms. Allocated memory was 147.8 MB in the beginning and 205.5 MB in the end (delta: 57.7 MB). Free memory was 102.2 MB in the beginning and 171.9 MB in the end (delta: -69.7 MB). Peak memory consumption was 23.3 MB. Max. memory is 7.1 GB.
[2020-09-24 19:25:11,496 INFO L168 Benchmark]: Boogie Preprocessor took 82.54 ms. Allocated memory is still 205.5 MB. Free memory was 171.9 MB in the beginning and 168.1 MB in the end (delta: 3.8 MB). Peak memory consumption was 3.8 MB. Max. memory is 7.1 GB.
[2020-09-24 19:25:11,497 INFO L168 Benchmark]: RCFGBuilder took 888.98 ms. Allocated memory is still 205.5 MB. Free memory was 168.1 MB in the beginning and 101.6 MB in the end (delta: 66.5 MB). Peak memory consumption was 66.5 MB. Max. memory is 7.1 GB.
[2020-09-24 19:25:11,497 INFO L168 Benchmark]: TraceAbstraction took 39133.02 ms. Allocated memory was 205.5 MB in the beginning and 505.4 MB in the end (delta: 299.9 MB). Free memory was 100.9 MB in the beginning and 159.8 MB in the end (delta: -58.9 MB). Peak memory consumption was 241.0 MB. Max. memory is 7.1 GB.
[2020-09-24 19:25:11,500 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 147.8 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
* CACSL2BoogieTranslator took 714.18 ms. Allocated memory was 147.8 MB in the beginning and 205.5 MB in the end (delta: 57.7 MB). Free memory was 102.2 MB in the beginning and 171.9 MB in the end (delta: -69.7 MB). Peak memory consumption was 23.3 MB. Max. memory is 7.1 GB.
* Boogie Preprocessor took 82.54 ms. Allocated memory is still 205.5 MB. Free memory was 171.9 MB in the beginning and 168.1 MB in the end (delta: 3.8 MB). Peak memory consumption was 3.8 MB. Max. memory is 7.1 GB.
* RCFGBuilder took 888.98 ms. Allocated memory is still 205.5 MB. Free memory was 168.1 MB in the beginning and 101.6 MB in the end (delta: 66.5 MB). Peak memory consumption was 66.5 MB. Max. memory is 7.1 GB.
* TraceAbstraction took 39133.02 ms. Allocated memory was 205.5 MB in the beginning and 505.4 MB in the end (delta: 299.9 MB). Free memory was 100.9 MB in the beginning and 159.8 MB in the end (delta: -58.9 MB). Peak memory consumption was 241.0 MB. Max. memory is 7.1 GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- CounterExampleResult [Line: 609]: a call of __VERIFIER_error() is reachable
a call of __VERIFIER_error() is reachable
We found a FailurePath:
[L541] struct TreeNode* root = malloc(sizeof(*root)), *n;
[L542] root->left = ((void *)0)
[L543] root->right = ((void *)0)
[L544] COND FALSE !(__VERIFIER_nondet_int())
[L563] n = ((void *)0)
[L564] struct TreeNode* pred;
[L565] COND TRUE \read(*root)
[L566] pred = ((void *)0)
[L567] n = root
[L568] EXPR n->left
[L568] n->left || n->right
[L568] EXPR n->right
[L568] n->left || n->right
[L568] COND FALSE !(n->left || n->right)
[L575] COND FALSE !(\read(*pred))
[L581] root = ((void *)0)
[L565] COND FALSE !(\read(*root))
[L584] List a = (List) malloc(sizeof(struct node));
[L585] COND FALSE !(a == 0)
[L586] List t;
[L587] List p = a;
[L588] COND TRUE __VERIFIER_nondet_int()
[L589] p->h = 1
[L590] t = (List) malloc(sizeof(struct node))
[L591] COND FALSE !(t == 0)
[L592] p->n = t
[L593] EXPR p->n
[L593] p = p->n
[L588] COND FALSE !(__VERIFIER_nondet_int())
[L595] COND TRUE __VERIFIER_nondet_int()
[L596] p->h = 2
[L597] t = (List) malloc(sizeof(struct node))
[L598] COND FALSE !(t == 0)
[L599] p->n = t
[L600] EXPR p->n
[L600] p = p->n
[L595] COND FALSE !(__VERIFIER_nondet_int())
[L602] p->h = 3
[L603] p = a
[L604] EXPR p->h
[L604] COND FALSE !(p->h == 2)
[L606] EXPR p->h
[L606] COND TRUE p->h == 1
[L607] EXPR p->n
[L607] p = p->n
[L606] EXPR p->h
[L606] COND FALSE !(p->h == 1)
[L608] EXPR p->h
[L608] COND TRUE p->h != 3
[L609] __VERIFIER_error()
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 6 procedures, 188 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 39.0s, OverallIterations: 20, TraceHistogramMax: 3, AutomataDifference: 18.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3451 SDtfs, 3831 SDslu, 21712 SDs, 0 SdLazy, 9531 SolverSat, 535 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 8.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 460 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 400 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2074 ImplicationChecksByTransitivity, 9.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=286occurred in iteration=15, 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, 19 MinimizatonAttempts, 824 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 18.9s InterpolantComputationTime, 1377 NumberOfCodeBlocks, 1377 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 1274 ConstructedInterpolants, 0 QuantifiedInterpolants, 524392 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 19 InterpolantComputations, 6 PerfectInterpolantSequences, 45/124 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...