/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound1.c
--------------------------------------------------------------------------------
This is Ultimate 0.2.1-dev-c225d54
[2021-05-02 15:35:25,716 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2021-05-02 15:35:25,718 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2021-05-02 15:35:25,750 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2021-05-02 15:35:25,751 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2021-05-02 15:35:25,754 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2021-05-02 15:35:25,756 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2021-05-02 15:35:25,759 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2021-05-02 15:35:25,761 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2021-05-02 15:35:25,764 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2021-05-02 15:35:25,765 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2021-05-02 15:35:25,766 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2021-05-02 15:35:25,766 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2021-05-02 15:35:25,768 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2021-05-02 15:35:25,769 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2021-05-02 15:35:25,770 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2021-05-02 15:35:25,772 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2021-05-02 15:35:25,772 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2021-05-02 15:35:25,774 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2021-05-02 15:35:25,778 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2021-05-02 15:35:25,779 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2021-05-02 15:35:25,780 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2021-05-02 15:35:25,782 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2021-05-02 15:35:25,783 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2021-05-02 15:35:25,788 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2021-05-02 15:35:25,788 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2021-05-02 15:35:25,788 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2021-05-02 15:35:25,790 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values
[2021-05-02 15:35:25,790 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values
[2021-05-02 15:35:25,790 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring...
[2021-05-02 15:35:25,791 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
[2021-05-02 15:35:25,791 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2021-05-02 15:35:25,792 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values
[2021-05-02 15:35:25,793 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values
[2021-05-02 15:35:25,793 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2021-05-02 15:35:25,794 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values
[2021-05-02 15:35:25,794 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2021-05-02 15:35:25,794 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring...
[2021-05-02 15:35:25,794 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
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[2021-05-02 15:35:25,795 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2021-05-02 15:35:25,796 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2021-05-02 15:35:25,824 INFO L113 SettingsManager]: Loading preferences was successful
[2021-05-02 15:35:25,825 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2021-05-02 15:35:25,827 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2021-05-02 15:35:25,827 INFO L138 SettingsManager]: * Create parallel compositions if possible=false
[2021-05-02 15:35:25,827 INFO L138 SettingsManager]: * Use SBE=true
[2021-05-02 15:35:25,827 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2021-05-02 15:35:25,827 INFO L138 SettingsManager]: * sizeof long=4
[2021-05-02 15:35:25,827 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2021-05-02 15:35:25,827 INFO L138 SettingsManager]: * sizeof POINTER=4
[2021-05-02 15:35:25,828 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2021-05-02 15:35:25,828 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2021-05-02 15:35:25,828 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2021-05-02 15:35:25,829 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2021-05-02 15:35:25,829 INFO L138 SettingsManager]: * sizeof long double=12
[2021-05-02 15:35:25,829 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2021-05-02 15:35:25,829 INFO L138 SettingsManager]: * Use constant arrays=true
[2021-05-02 15:35:25,829 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2021-05-02 15:35:25,829 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2021-05-02 15:35:25,829 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2021-05-02 15:35:25,829 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2021-05-02 15:35:25,830 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-05-02 15:35:25,830 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2021-05-02 15:35:25,830 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2021-05-02 15:35:25,830 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2021-05-02 15:35:25,830 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL
[2021-05-02 15:35:25,830 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2021-05-02 15:35:25,830 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2021-05-02 15:35:25,830 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE
[2021-05-02 15:35:25,831 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN;
[2021-05-02 15:35:26,129 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2021-05-02 15:35:26,145 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2021-05-02 15:35:26,147 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2021-05-02 15:35:26,148 INFO L271 PluginConnector]: Initializing CDTParser...
[2021-05-02 15:35:26,149 INFO L275 PluginConnector]: CDTParser initialized
[2021-05-02 15:35:26,150 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound1.c
[2021-05-02 15:35:26,203 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5828b7208/6ddd7938a37a4d628bc0e484dff3fb73/FLAGa2c89bdd9
[2021-05-02 15:35:26,590 INFO L306 CDTParser]: Found 1 translation units.
[2021-05-02 15:35:26,590 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound1.c
[2021-05-02 15:35:26,595 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5828b7208/6ddd7938a37a4d628bc0e484dff3fb73/FLAGa2c89bdd9
[2021-05-02 15:35:26,999 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5828b7208/6ddd7938a37a4d628bc0e484dff3fb73
[2021-05-02 15:35:27,001 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2021-05-02 15:35:27,003 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2021-05-02 15:35:27,005 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2021-05-02 15:35:27,006 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2021-05-02 15:35:27,008 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2021-05-02 15:35:27,009 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:35:27" (1/1) ...
[2021-05-02 15:35:27,010 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27b98b66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:35:27, skipping insertion in model container
[2021-05-02 15:35:27,010 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:35:27" (1/1) ...
[2021-05-02 15:35:27,017 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2021-05-02 15:35:27,030 INFO L178 MainTranslator]: Built tables and reachable declarations
[2021-05-02 15:35:27,110 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound1.c[526,539]
[2021-05-02 15:35:27,122 INFO L206 PostProcessor]: Analyzing one entry point: main
[2021-05-02 15:35:27,127 INFO L203 MainTranslator]: Completed pre-run
[2021-05-02 15:35:27,154 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound1.c[526,539]
[2021-05-02 15:35:27,158 INFO L206 PostProcessor]: Analyzing one entry point: main
[2021-05-02 15:35:27,185 INFO L208 MainTranslator]: Completed translation
[2021-05-02 15:35:27,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:35:27 WrapperNode
[2021-05-02 15:35:27,186 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2021-05-02 15:35:27,189 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2021-05-02 15:35:27,189 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2021-05-02 15:35:27,189 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2021-05-02 15:35:27,197 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:35:27" (1/1) ...
[2021-05-02 15:35:27,198 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:35:27" (1/1) ...
[2021-05-02 15:35:27,203 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:35:27" (1/1) ...
[2021-05-02 15:35:27,203 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:35:27" (1/1) ...
[2021-05-02 15:35:27,216 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:35:27" (1/1) ...
[2021-05-02 15:35:27,220 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:35:27" (1/1) ...
[2021-05-02 15:35:27,225 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:35:27" (1/1) ...
[2021-05-02 15:35:27,229 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2021-05-02 15:35:27,230 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2021-05-02 15:35:27,230 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2021-05-02 15:35:27,230 INFO L275 PluginConnector]: RCFGBuilder initialized
[2021-05-02 15:35:27,231 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:35:27" (1/1) ...
No working directory specified, using /storage/repos/ultimate/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
[2021-05-02 15:35:27,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2021-05-02 15:35:27,291 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2021-05-02 15:35:27,291 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error
[2021-05-02 15:35:27,291 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2021-05-02 15:35:27,291 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2021-05-02 15:35:27,291 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2021-05-02 15:35:27,291 INFO L130 BoogieDeclarations]: Found specification of procedure abort
[2021-05-02 15:35:27,292 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail
[2021-05-02 15:35:27,292 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error
[2021-05-02 15:35:27,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2021-05-02 15:35:27,293 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2021-05-02 15:35:27,293 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2021-05-02 15:35:27,293 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2021-05-02 15:35:27,294 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2021-05-02 15:35:27,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2021-05-02 15:35:27,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int
[2021-05-02 15:35:27,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2021-05-02 15:35:27,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~int
[2021-05-02 15:35:27,296 INFO L130 BoogieDeclarations]: Found specification of procedure read~int
[2021-05-02 15:35:27,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2021-05-02 15:35:27,496 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2021-05-02 15:35:27,496 INFO L299 CfgBuilder]: Removed 2 assume(true) statements.
[2021-05-02 15:35:27,497 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:35:27 BoogieIcfgContainer
[2021-05-02 15:35:27,498 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2021-05-02 15:35:27,499 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2021-05-02 15:35:27,499 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2021-05-02 15:35:27,501 INFO L275 PluginConnector]: TraceAbstraction initialized
[2021-05-02 15:35:27,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 03:35:27" (1/3) ...
[2021-05-02 15:35:27,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25c20b89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:35:27, skipping insertion in model container
[2021-05-02 15:35:27,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:35:27" (2/3) ...
[2021-05-02 15:35:27,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25c20b89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:35:27, skipping insertion in model container
[2021-05-02 15:35:27,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:35:27" (3/3) ...
[2021-05-02 15:35:27,502 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound1.c
[2021-05-02 15:35:27,506 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2021-05-02 15:35:27,508 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2021-05-02 15:35:27,520 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2021-05-02 15:35:27,535 INFO L376 AbstractCegarLoop]: Interprodecural is true
[2021-05-02 15:35:27,535 INFO L377 AbstractCegarLoop]: Hoare is true
[2021-05-02 15:35:27,535 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP
[2021-05-02 15:35:27,535 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2021-05-02 15:35:27,535 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2021-05-02 15:35:27,535 INFO L381 AbstractCegarLoop]: Difference is false
[2021-05-02 15:35:27,536 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2021-05-02 15:35:27,536 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2021-05-02 15:35:27,558 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9)
[2021-05-02 15:35:27,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2021-05-02 15:35:27,561 INFO L515 BasicCegarLoop]: Found error trace
[2021-05-02 15:35:27,561 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-05-02 15:35:27,562 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-05-02 15:35:27,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-05-02 15:35:27,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1682617676, now seen corresponding path program 1 times
[2021-05-02 15:35:27,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-05-02 15:35:27,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509670965]
[2021-05-02 15:35:27,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-05-02 15:35:27,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-02 15:35:27,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2021-05-02 15:35:27,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-02 15:35:27,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-05-02 15:35:27,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-05-02 15:35:27,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509670965]
[2021-05-02 15:35:27,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509670965] provided 1 perfect and 0 imperfect interpolant sequences
[2021-05-02 15:35:27,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-05-02 15:35:27,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-05-02 15:35:27,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57147362]
[2021-05-02 15:35:27,775 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states
[2021-05-02 15:35:27,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-05-02 15:35:27,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-05-02 15:35:27,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-05-02 15:35:27,790 INFO L87 Difference]: Start difference. First operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2021-05-02 15:35:27,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-05-02 15:35:27,929 INFO L93 Difference]: Finished difference Result 57 states and 91 transitions.
[2021-05-02 15:35:27,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2021-05-02 15:35:27,932 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12
[2021-05-02 15:35:27,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-05-02 15:35:27,938 INFO L225 Difference]: With dead ends: 57
[2021-05-02 15:35:27,938 INFO L226 Difference]: Without dead ends: 27
[2021-05-02 15:35:27,942 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-05-02 15:35:27,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states.
[2021-05-02 15:35:27,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26.
[2021-05-02 15:35:27,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 9 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7)
[2021-05-02 15:35:27,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions.
[2021-05-02 15:35:27,974 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 12
[2021-05-02 15:35:27,974 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-05-02 15:35:27,975 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions.
[2021-05-02 15:35:27,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2021-05-02 15:35:27,975 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions.
[2021-05-02 15:35:27,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2021-05-02 15:35:27,975 INFO L515 BasicCegarLoop]: Found error trace
[2021-05-02 15:35:27,975 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-05-02 15:35:27,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2021-05-02 15:35:27,976 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-05-02 15:35:27,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-05-02 15:35:27,976 INFO L82 PathProgramCache]: Analyzing trace with hash -2144676086, now seen corresponding path program 1 times
[2021-05-02 15:35:27,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-05-02 15:35:27,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391632527]
[2021-05-02 15:35:27,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-05-02 15:35:28,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-02 15:35:28,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2021-05-02 15:35:28,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-02 15:35:28,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-05-02 15:35:28,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-05-02 15:35:28,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391632527]
[2021-05-02 15:35:28,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391632527] provided 1 perfect and 0 imperfect interpolant sequences
[2021-05-02 15:35:28,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-05-02 15:35:28,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2021-05-02 15:35:28,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522268640]
[2021-05-02 15:35:28,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states
[2021-05-02 15:35:28,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-05-02 15:35:28,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2021-05-02 15:35:28,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2021-05-02 15:35:28,124 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2021-05-02 15:35:28,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-05-02 15:35:28,341 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions.
[2021-05-02 15:35:28,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states.
[2021-05-02 15:35:28,341 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12
[2021-05-02 15:35:28,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-05-02 15:35:28,342 INFO L225 Difference]: With dead ends: 41
[2021-05-02 15:35:28,342 INFO L226 Difference]: Without dead ends: 39
[2021-05-02 15:35:28,343 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 127.5ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90
[2021-05-02 15:35:28,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states.
[2021-05-02 15:35:28,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30.
[2021-05-02 15:35:28,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7)
[2021-05-02 15:35:28,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions.
[2021-05-02 15:35:28,359 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 12
[2021-05-02 15:35:28,359 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-05-02 15:35:28,359 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions.
[2021-05-02 15:35:28,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2021-05-02 15:35:28,360 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions.
[2021-05-02 15:35:28,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15
[2021-05-02 15:35:28,360 INFO L515 BasicCegarLoop]: Found error trace
[2021-05-02 15:35:28,360 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-05-02 15:35:28,361 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2021-05-02 15:35:28,361 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-05-02 15:35:28,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-05-02 15:35:28,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1842794081, now seen corresponding path program 1 times
[2021-05-02 15:35:28,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-05-02 15:35:28,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785897670]
[2021-05-02 15:35:28,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-05-02 15:35:28,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-02 15:35:28,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2021-05-02 15:35:28,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-02 15:35:28,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-05-02 15:35:28,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-05-02 15:35:28,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785897670]
[2021-05-02 15:35:28,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785897670] provided 1 perfect and 0 imperfect interpolant sequences
[2021-05-02 15:35:28,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-05-02 15:35:28,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2021-05-02 15:35:28,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114819724]
[2021-05-02 15:35:28,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states
[2021-05-02 15:35:28,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-05-02 15:35:28,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2021-05-02 15:35:28,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2021-05-02 15:35:28,425 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2021-05-02 15:35:28,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-05-02 15:35:28,538 INFO L93 Difference]: Finished difference Result 46 states and 61 transitions.
[2021-05-02 15:35:28,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states.
[2021-05-02 15:35:28,538 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14
[2021-05-02 15:35:28,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-05-02 15:35:28,539 INFO L225 Difference]: With dead ends: 46
[2021-05-02 15:35:28,539 INFO L226 Difference]: Without dead ends: 32
[2021-05-02 15:35:28,539 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 59.3ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2021-05-02 15:35:28,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states.
[2021-05-02 15:35:28,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32.
[2021-05-02 15:35:28,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7)
[2021-05-02 15:35:28,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions.
[2021-05-02 15:35:28,543 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 14
[2021-05-02 15:35:28,543 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-05-02 15:35:28,544 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions.
[2021-05-02 15:35:28,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2021-05-02 15:35:28,544 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions.
[2021-05-02 15:35:28,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2021-05-02 15:35:28,544 INFO L515 BasicCegarLoop]: Found error trace
[2021-05-02 15:35:28,544 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-05-02 15:35:28,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2021-05-02 15:35:28,544 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-05-02 15:35:28,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-05-02 15:35:28,545 INFO L82 PathProgramCache]: Analyzing trace with hash 311129497, now seen corresponding path program 1 times
[2021-05-02 15:35:28,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-05-02 15:35:28,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021890790]
[2021-05-02 15:35:28,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-05-02 15:35:28,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-02 15:35:28,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2021-05-02 15:35:28,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-02 15:35:28,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2021-05-02 15:35:28,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-02 15:35:28,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-05-02 15:35:28,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-05-02 15:35:28,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021890790]
[2021-05-02 15:35:28,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021890790] provided 1 perfect and 0 imperfect interpolant sequences
[2021-05-02 15:35:28,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-05-02 15:35:28,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2021-05-02 15:35:28,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819024355]
[2021-05-02 15:35:28,622 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states
[2021-05-02 15:35:28,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-05-02 15:35:28,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2021-05-02 15:35:28,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2021-05-02 15:35:28,623 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2021-05-02 15:35:28,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-05-02 15:35:28,792 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions.
[2021-05-02 15:35:28,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states.
[2021-05-02 15:35:28,792 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17
[2021-05-02 15:35:28,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-05-02 15:35:28,793 INFO L225 Difference]: With dead ends: 46
[2021-05-02 15:35:28,793 INFO L226 Difference]: Without dead ends: 44
[2021-05-02 15:35:28,793 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 90.2ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90
[2021-05-02 15:35:28,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states.
[2021-05-02 15:35:28,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36.
[2021-05-02 15:35:28,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7)
[2021-05-02 15:35:28,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions.
[2021-05-02 15:35:28,803 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 17
[2021-05-02 15:35:28,804 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-05-02 15:35:28,804 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions.
[2021-05-02 15:35:28,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2021-05-02 15:35:28,804 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions.
[2021-05-02 15:35:28,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2021-05-02 15:35:28,804 INFO L515 BasicCegarLoop]: Found error trace
[2021-05-02 15:35:28,804 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-05-02 15:35:28,805 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2021-05-02 15:35:28,805 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-05-02 15:35:28,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-05-02 15:35:28,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1912623062, now seen corresponding path program 1 times
[2021-05-02 15:35:28,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-05-02 15:35:28,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582315087]
[2021-05-02 15:35:28,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-05-02 15:35:28,822 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2021-05-02 15:35:28,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [37633982]
[2021-05-02 15:35:28,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-05-02 15:35:28,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-02 15:35:28,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 21 conjunts are in the unsatisfiable core
[2021-05-02 15:35:28,905 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2021-05-02 15:35:29,108 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2021-05-02 15:35:29,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-05-02 15:35:29,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582315087]
[2021-05-02 15:35:29,108 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown
[2021-05-02 15:35:29,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37633982]
[2021-05-02 15:35:29,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37633982] provided 0 perfect and 1 imperfect interpolant sequences
[2021-05-02 15:35:29,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2021-05-02 15:35:29,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8
[2021-05-02 15:35:29,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581552290]
[2021-05-02 15:35:29,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states
[2021-05-02 15:35:29,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-05-02 15:35:29,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2021-05-02 15:35:29,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56
[2021-05-02 15:35:29,110 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3)
[2021-05-02 15:35:29,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-05-02 15:35:29,227 INFO L93 Difference]: Finished difference Result 69 states and 90 transitions.
[2021-05-02 15:35:29,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states.
[2021-05-02 15:35:29,227 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 22
[2021-05-02 15:35:29,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-05-02 15:35:29,230 INFO L225 Difference]: With dead ends: 69
[2021-05-02 15:35:29,230 INFO L226 Difference]: Without dead ends: 54
[2021-05-02 15:35:29,230 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 53.0ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90
[2021-05-02 15:35:29,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states.
[2021-05-02 15:35:29,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54.
[2021-05-02 15:35:29,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.25) internal successors, (40), 34 states have internal predecessors, (40), 15 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12)
[2021-05-02 15:35:29,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 67 transitions.
[2021-05-02 15:35:29,245 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 67 transitions. Word has length 22
[2021-05-02 15:35:29,245 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-05-02 15:35:29,245 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 67 transitions.
[2021-05-02 15:35:29,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3)
[2021-05-02 15:35:29,246 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 67 transitions.
[2021-05-02 15:35:29,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31
[2021-05-02 15:35:29,249 INFO L515 BasicCegarLoop]: Found error trace
[2021-05-02 15:35:29,249 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-05-02 15:35:29,460 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-05-02 15:35:29,462 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-05-02 15:35:29,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-05-02 15:35:29,462 INFO L82 PathProgramCache]: Analyzing trace with hash 214651490, now seen corresponding path program 1 times
[2021-05-02 15:35:29,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-05-02 15:35:29,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031626176]
[2021-05-02 15:35:29,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-05-02 15:35:29,468 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2021-05-02 15:35:29,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1980022648]
[2021-05-02 15:35:29,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-05-02 15:35:29,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-02 15:35:29,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 15 conjunts are in the unsatisfiable core
[2021-05-02 15:35:29,518 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2021-05-02 15:35:29,615 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2021-05-02 15:35:29,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-05-02 15:35:29,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031626176]
[2021-05-02 15:35:29,615 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown
[2021-05-02 15:35:29,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980022648]
[2021-05-02 15:35:29,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980022648] provided 0 perfect and 1 imperfect interpolant sequences
[2021-05-02 15:35:29,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2021-05-02 15:35:29,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7
[2021-05-02 15:35:29,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624096318]
[2021-05-02 15:35:29,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states
[2021-05-02 15:35:29,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-05-02 15:35:29,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2021-05-02 15:35:29,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42
[2021-05-02 15:35:29,617 INFO L87 Difference]: Start difference. First operand 54 states and 67 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4)
[2021-05-02 15:35:29,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-05-02 15:35:29,683 INFO L93 Difference]: Finished difference Result 68 states and 86 transitions.
[2021-05-02 15:35:29,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states.
[2021-05-02 15:35:29,683 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30
[2021-05-02 15:35:29,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-05-02 15:35:29,684 INFO L225 Difference]: With dead ends: 68
[2021-05-02 15:35:29,684 INFO L226 Difference]: Without dead ends: 60
[2021-05-02 15:35:29,684 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 42.1ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72
[2021-05-02 15:35:29,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states.
[2021-05-02 15:35:29,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59.
[2021-05-02 15:35:29,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 36 states have (on average 1.25) internal successors, (45), 38 states have internal predecessors, (45), 15 states have call successors, (15), 8 states have call predecessors, (15), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13)
[2021-05-02 15:35:29,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions.
[2021-05-02 15:35:29,690 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 30
[2021-05-02 15:35:29,690 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-05-02 15:35:29,690 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions.
[2021-05-02 15:35:29,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4)
[2021-05-02 15:35:29,690 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions.
[2021-05-02 15:35:29,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38
[2021-05-02 15:35:29,691 INFO L515 BasicCegarLoop]: Found error trace
[2021-05-02 15:35:29,691 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-05-02 15:35:29,891 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-05-02 15:35:29,891 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-05-02 15:35:29,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-05-02 15:35:29,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1255015940, now seen corresponding path program 1 times
[2021-05-02 15:35:29,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-05-02 15:35:29,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586662901]
[2021-05-02 15:35:29,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-05-02 15:35:29,897 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2021-05-02 15:35:29,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1880527481]
[2021-05-02 15:35:29,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-05-02 15:35:29,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2021-05-02 15:35:29,956 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2021-05-02 15:35:29,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2021-05-02 15:35:29,974 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2021-05-02 15:35:30,023 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace
[2021-05-02 15:35:30,023 INFO L624 BasicCegarLoop]: Counterexample might be feasible
[2021-05-02 15:35:30,224 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-05-02 15:35:30,259 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 03:35:30 BoogieIcfgContainer
[2021-05-02 15:35:30,259 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2021-05-02 15:35:30,260 INFO L168 Benchmark]: Toolchain (without parser) took 3257.23 ms. Allocated memory was 205.5 MB in the beginning and 247.5 MB in the end (delta: 41.9 MB). Free memory was 169.8 MB in the beginning and 156.7 MB in the end (delta: 13.1 MB). Peak memory consumption was 54.3 MB. Max. memory is 8.0 GB.
[2021-05-02 15:35:30,261 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 205.5 MB. Free memory was 186.4 MB in the beginning and 186.3 MB in the end (delta: 139.7 kB). There was no memory consumed. Max. memory is 8.0 GB.
[2021-05-02 15:35:30,261 INFO L168 Benchmark]: CACSL2BoogieTranslator took 180.31 ms. Allocated memory is still 205.5 MB. Free memory was 169.6 MB in the beginning and 187.2 MB in the end (delta: -17.6 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB.
[2021-05-02 15:35:30,261 INFO L168 Benchmark]: Boogie Preprocessor took 40.34 ms. Allocated memory is still 205.5 MB. Free memory was 187.2 MB in the beginning and 185.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB.
[2021-05-02 15:35:30,263 INFO L168 Benchmark]: RCFGBuilder took 267.35 ms. Allocated memory is still 205.5 MB. Free memory was 185.7 MB in the beginning and 169.0 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB.
[2021-05-02 15:35:30,263 INFO L168 Benchmark]: TraceAbstraction took 2760.95 ms. Allocated memory was 205.5 MB in the beginning and 247.5 MB in the end (delta: 41.9 MB). Free memory was 169.0 MB in the beginning and 156.7 MB in the end (delta: 12.3 MB). Peak memory consumption was 55.2 MB. Max. memory is 8.0 GB.
[2021-05-02 15:35:30,268 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.14 ms. Allocated memory is still 205.5 MB. Free memory was 186.4 MB in the beginning and 186.3 MB in the end (delta: 139.7 kB). There was no memory consumed. Max. memory is 8.0 GB.
* CACSL2BoogieTranslator took 180.31 ms. Allocated memory is still 205.5 MB. Free memory was 169.6 MB in the beginning and 187.2 MB in the end (delta: -17.6 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB.
* Boogie Preprocessor took 40.34 ms. Allocated memory is still 205.5 MB. Free memory was 187.2 MB in the beginning and 185.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB.
* RCFGBuilder took 267.35 ms. Allocated memory is still 205.5 MB. Free memory was 185.7 MB in the beginning and 169.0 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB.
* TraceAbstraction took 2760.95 ms. Allocated memory was 205.5 MB in the beginning and 247.5 MB in the end (delta: 41.9 MB). Free memory was 169.0 MB in the beginning and 156.7 MB in the end (delta: 12.3 MB). Peak memory consumption was 55.2 MB. Max. memory is 8.0 GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- CounterExampleResult [Line: 17]: a call to reach_error is reachable
a call to reach_error is reachable
We found a FailurePath:
[L22] int counter = 0;
VAL [\old(counter)=11, counter=0]
[L24] int A, B;
[L25] int r, d, p, q;
[L26] A = __VERIFIER_nondet_int()
[L27] B = 1
[L29] r = A
[L30] d = B
[L31] p = 1
[L32] q = 0
VAL [\old(counter)=0, A=1, B=1, counter=0, d=1, p=1, q=0, r=1]
[L34] EXPR counter++
VAL [\old(counter)=0, A=1, B=1, counter=1, counter++=0, d=1, p=1, q=0, r=1]
[L34] COND TRUE counter++<1
[L35] CALL __VERIFIER_assert(q == 0)
VAL [\old(cond)=1, \old(counter)=0, counter=1]
[L15] COND FALSE !(!(cond))
VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1]
[L35] RET __VERIFIER_assert(q == 0)
VAL [\old(counter)=0, A=1, B=1, counter=1, d=1, p=1, q=0, r=1]
[L36] CALL __VERIFIER_assert(r == A)
VAL [\old(cond)=1, \old(counter)=0, counter=1]
[L15] COND FALSE !(!(cond))
VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1]
[L36] RET __VERIFIER_assert(r == A)
VAL [\old(counter)=0, A=1, B=1, counter=1, d=1, p=1, q=0, r=1]
[L37] CALL __VERIFIER_assert(d == B * p)
VAL [\old(cond)=1, \old(counter)=0, counter=1]
[L15] COND FALSE !(!(cond))
VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1]
[L37] RET __VERIFIER_assert(d == B * p)
VAL [\old(counter)=0, A=1, B=1, counter=1, d=1, p=1, q=0, r=1]
[L38] COND FALSE !(!(r >= d))
[L40] d = 2 * d
[L41] p = 2 * p
VAL [\old(counter)=0, A=1, B=1, counter=1, d=2, p=2, q=0, r=1]
[L34] EXPR counter++
VAL [\old(counter)=0, A=1, B=1, counter=2, counter++=1, d=2, p=2, q=0, r=1]
[L34] COND FALSE !(counter++<1)
[L44] EXPR counter++
VAL [\old(counter)=0, A=1, B=1, counter=3, counter++=2, d=2, p=2, q=0, r=1]
[L44] COND FALSE !(counter++<1)
[L58] CALL __VERIFIER_assert(A == d*q + r)
VAL [\old(cond)=1, \old(counter)=0, counter=3]
[L15] COND FALSE !(!(cond))
VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3]
[L58] RET __VERIFIER_assert(A == d*q + r)
VAL [\old(counter)=0, A=1, B=1, counter=3, d=2, p=2, q=0, r=1]
[L59] CALL __VERIFIER_assert(B == d)
VAL [\old(cond)=0, \old(counter)=0, counter=3]
[L15] COND TRUE !(cond)
VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3]
[L17] reach_error()
VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3]
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 6 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2691.0ms, OverallIterations: 7, TraceHistogramMax: 5, EmptinessCheckTime: 11.4ms, AutomataDifference: 860.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 19.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 185 SDtfs, 92 SDslu, 355 SDs, 0 SdLazy, 396 SolverSat, 58 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 380.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 89 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 417.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=6, InterpolantAutomatonStates: 39, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 71.5ms AutomataMinimizationTime, 6 MinimizatonAttempts, 19 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 41.7ms SsaConstructionTime, 157.5ms SatisfiabilityAnalysisTime, 624.0ms InterpolantComputationTime, 144 NumberOfCodeBlocks, 144 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 101 ConstructedInterpolants, 0 QuantifiedInterpolants, 403 SizeOfPredicates, 7 NumberOfNonLiveVariables, 269 ConjunctsInSsa, 36 ConjunctsInUnsatCore, 6 InterpolantComputations, 4 PerfectInterpolantSequences, 17/28 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...