/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_valuebound2.c
--------------------------------------------------------------------------------
This is Ultimate 0.2.1-dev-1a84f73
[2021-05-01 08:22:57,146 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2021-05-01 08:22:57,147 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2021-05-01 08:22:57,169 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2021-05-01 08:22:57,169 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2021-05-01 08:22:57,170 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2021-05-01 08:22:57,171 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2021-05-01 08:22:57,172 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
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[2021-05-01 08:22:57,175 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
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[2021-05-01 08:22:57,177 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2021-05-01 08:22:57,177 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2021-05-01 08:22:57,178 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2021-05-01 08:22:57,179 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2021-05-01 08:22:57,180 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2021-05-01 08:22:57,205 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2021-05-01 08:22:57,206 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2021-05-01 08:22:57,206 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2021-05-01 08:22:57,207 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2021-05-01 08:22:57,208 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
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[2021-05-01 08:22:57,217 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf
[2021-05-01 08:22:57,231 INFO L113 SettingsManager]: Loading preferences was successful
[2021-05-01 08:22:57,231 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2021-05-01 08:22:57,233 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2021-05-01 08:22:57,233 INFO L138 SettingsManager]: * sizeof long=4
[2021-05-01 08:22:57,233 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2021-05-01 08:22:57,233 INFO L138 SettingsManager]: * sizeof POINTER=4
[2021-05-01 08:22:57,233 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2021-05-01 08:22:57,233 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2021-05-01 08:22:57,233 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2021-05-01 08:22:57,234 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2021-05-01 08:22:57,234 INFO L138 SettingsManager]: * sizeof long double=12
[2021-05-01 08:22:57,234 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2021-05-01 08:22:57,234 INFO L138 SettingsManager]: * Use constant arrays=true
[2021-05-01 08:22:57,234 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2021-05-01 08:22:57,234 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2021-05-01 08:22:57,234 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2021-05-01 08:22:57,235 INFO L138 SettingsManager]: * To the following directory=./dump/
[2021-05-01 08:22:57,235 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2021-05-01 08:22:57,235 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-05-01 08:22:57,235 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2021-05-01 08:22:57,235 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation
[2021-05-01 08:22:57,235 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2021-05-01 08:22:57,235 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN
[2021-05-01 08:22:57,236 INFO L138 SettingsManager]: * Use separate solver for trace checks=false
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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
[2021-05-01 08:22:57,525 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2021-05-01 08:22:57,551 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2021-05-01 08:22:57,553 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2021-05-01 08:22:57,554 INFO L271 PluginConnector]: Initializing CDTParser...
[2021-05-01 08:22:57,555 INFO L275 PluginConnector]: CDTParser initialized
[2021-05-01 08:22:57,556 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_valuebound2.c
[2021-05-01 08:22:57,613 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e601a16ea/f5daaa023b7f4193ac4de416356454a0/FLAG86eb2b80c
[2021-05-01 08:22:57,960 INFO L306 CDTParser]: Found 1 translation units.
[2021-05-01 08:22:57,961 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_valuebound2.c
[2021-05-01 08:22:57,966 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e601a16ea/f5daaa023b7f4193ac4de416356454a0/FLAG86eb2b80c
[2021-05-01 08:22:57,978 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e601a16ea/f5daaa023b7f4193ac4de416356454a0
[2021-05-01 08:22:57,982 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2021-05-01 08:22:57,984 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2021-05-01 08:22:57,987 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2021-05-01 08:22:57,987 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2021-05-01 08:22:57,990 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2021-05-01 08:22:57,990 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:22:57" (1/1) ...
[2021-05-01 08:22:57,991 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a96ad8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:22:57, skipping insertion in model container
[2021-05-01 08:22:57,991 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:22:57" (1/1) ...
[2021-05-01 08:22:57,997 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2021-05-01 08:22:58,008 INFO L178 MainTranslator]: Built tables and reachable declarations
[2021-05-01 08:22:58,136 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/fermat2-ll_valuebound2.c[524,537]
[2021-05-01 08:22:58,157 INFO L206 PostProcessor]: Analyzing one entry point: main
[2021-05-01 08:22:58,178 INFO L203 MainTranslator]: Completed pre-run
[2021-05-01 08:22:58,193 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/fermat2-ll_valuebound2.c[524,537]
[2021-05-01 08:22:58,227 INFO L206 PostProcessor]: Analyzing one entry point: main
[2021-05-01 08:22:58,238 INFO L208 MainTranslator]: Completed translation
[2021-05-01 08:22:58,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:22:58 WrapperNode
[2021-05-01 08:22:58,238 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2021-05-01 08:22:58,239 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2021-05-01 08:22:58,239 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2021-05-01 08:22:58,239 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2021-05-01 08:22:58,248 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:22:58" (1/1) ...
[2021-05-01 08:22:58,248 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:22:58" (1/1) ...
[2021-05-01 08:22:58,255 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:22:58" (1/1) ...
[2021-05-01 08:22:58,255 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:22:58" (1/1) ...
[2021-05-01 08:22:58,268 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:22:58" (1/1) ...
[2021-05-01 08:22:58,271 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:22:58" (1/1) ...
[2021-05-01 08:22:58,277 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:22:58" (1/1) ...
[2021-05-01 08:22:58,279 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2021-05-01 08:22:58,282 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2021-05-01 08:22:58,282 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2021-05-01 08:22:58,282 INFO L275 PluginConnector]: RCFGBuilder initialized
[2021-05-01 08:22:58,283 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:22:58" (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
[2021-05-01 08:22:58,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2021-05-01 08:22:58,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2021-05-01 08:22:58,342 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error
[2021-05-01 08:22:58,342 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2021-05-01 08:22:58,342 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2021-05-01 08:22:58,342 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2021-05-01 08:22:58,343 INFO L130 BoogieDeclarations]: Found specification of procedure abort
[2021-05-01 08:22:58,343 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail
[2021-05-01 08:22:58,343 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error
[2021-05-01 08:22:58,343 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2021-05-01 08:22:58,343 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2021-05-01 08:22:58,343 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2021-05-01 08:22:58,343 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2021-05-01 08:22:58,344 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2021-05-01 08:22:58,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2021-05-01 08:22:58,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int
[2021-05-01 08:22:58,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2021-05-01 08:22:58,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~int
[2021-05-01 08:22:58,345 INFO L130 BoogieDeclarations]: Found specification of procedure read~int
[2021-05-01 08:22:58,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2021-05-01 08:22:58,625 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2021-05-01 08:22:58,625 INFO L299 CfgBuilder]: Removed 1 assume(true) statements.
[2021-05-01 08:22:58,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:22:58 BoogieIcfgContainer
[2021-05-01 08:22:58,626 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2021-05-01 08:22:58,628 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2021-05-01 08:22:58,628 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2021-05-01 08:22:58,630 INFO L275 PluginConnector]: TraceAbstraction initialized
[2021-05-01 08:22:58,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.05 08:22:57" (1/3) ...
[2021-05-01 08:22:58,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7066dd11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:22:58, skipping insertion in model container
[2021-05-01 08:22:58,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:22:58" (2/3) ...
[2021-05-01 08:22:58,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7066dd11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:22:58, skipping insertion in model container
[2021-05-01 08:22:58,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:22:58" (3/3) ...
[2021-05-01 08:22:58,632 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat2-ll_valuebound2.c
[2021-05-01 08:22:58,637 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION
[2021-05-01 08:22:58,639 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2021-05-01 08:22:58,652 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2021-05-01 08:22:58,666 INFO L376 AbstractCegarLoop]: Interprodecural is true
[2021-05-01 08:22:58,667 INFO L377 AbstractCegarLoop]: Hoare is true
[2021-05-01 08:22:58,667 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation
[2021-05-01 08:22:58,667 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2021-05-01 08:22:58,667 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2021-05-01 08:22:58,667 INFO L381 AbstractCegarLoop]: Difference is false
[2021-05-01 08:22:58,667 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2021-05-01 08:22:58,667 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2021-05-01 08:22:58,678 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8)
[2021-05-01 08:22:58,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34
[2021-05-01 08:22:58,683 INFO L511 BasicCegarLoop]: Found error trace
[2021-05-01 08:22:58,684 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-05-01 08:22:58,684 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-05-01 08:22:58,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-05-01 08:22:58,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1790211013, now seen corresponding path program 1 times
[2021-05-01 08:22:58,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2021-05-01 08:22:58,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702080606]
[2021-05-01 08:22:58,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-05-01 08:22:58,752 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2021-05-01 08:22:58,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-01 08:22:58,880 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:22:58,881 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:22:58,881 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:22:58,882 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:22:58,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2021-05-01 08:22:58,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-01 08:22:58,957 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:22:58,958 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:22:58,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2021-05-01 08:22:58,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-01 08:22:58,964 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:22:58,965 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:22:58,965 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:22:58,966 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:22:58,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12
[2021-05-01 08:22:58,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-01 08:22:58,972 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:22:58,973 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:22:58,974 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:22:58,975 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:22:58,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17
[2021-05-01 08:22:58,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-01 08:22:58,980 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:22:58,982 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:22:58,982 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:22:58,983 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:22:58,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22
[2021-05-01 08:22:58,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-01 08:22:58,989 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:22:58,990 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:22:58,990 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:22:58,991 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:22:58,992 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked.
[2021-05-01 08:22:58,994 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2021-05-01 08:22:58,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702080606]
[2021-05-01 08:22:58,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1702080606] provided 1 perfect and 0 imperfect interpolant sequences
[2021-05-01 08:22:58,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-05-01 08:22:58,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-05-01 08:22:58,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242038073]
[2021-05-01 08:22:59,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states
[2021-05-01 08:22:59,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2021-05-01 08:22:59,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-05-01 08:22:59,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-05-01 08:22:59,012 INFO L87 Difference]: Start difference. First operand has 32 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)
[2021-05-01 08:22:59,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-05-01 08:22:59,148 INFO L93 Difference]: Finished difference Result 57 states and 80 transitions.
[2021-05-01 08:22:59,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2021-05-01 08:22:59,150 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33
[2021-05-01 08:22:59,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-05-01 08:22:59,155 INFO L225 Difference]: With dead ends: 57
[2021-05-01 08:22:59,155 INFO L226 Difference]: Without dead ends: 27
[2021-05-01 08:22:59,157 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-05-01 08:22:59,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states.
[2021-05-01 08:22:59,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27.
[2021-05-01 08:22:59,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6)
[2021-05-01 08:22:59,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions.
[2021-05-01 08:22:59,200 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 33
[2021-05-01 08:22:59,200 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-05-01 08:22:59,200 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions.
[2021-05-01 08:22:59,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)
[2021-05-01 08:22:59,200 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions.
[2021-05-01 08:22:59,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34
[2021-05-01 08:22:59,201 INFO L511 BasicCegarLoop]: Found error trace
[2021-05-01 08:22:59,202 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-05-01 08:22:59,202 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2021-05-01 08:22:59,202 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-05-01 08:22:59,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-05-01 08:22:59,202 INFO L82 PathProgramCache]: Analyzing trace with hash -102231875, now seen corresponding path program 1 times
[2021-05-01 08:22:59,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2021-05-01 08:22:59,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2119074514]
[2021-05-01 08:22:59,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-05-01 08:22:59,208 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2021-05-01 08:22:59,228 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility
[2021-05-01 08:22:59,228 INFO L620 BasicCegarLoop]: Counterexample might be feasible
[2021-05-01 08:22:59,231 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2021-05-01 08:22:59,240 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually.
[2021-05-01 08:22:59,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 08:22:59 BoogieIcfgContainer
[2021-05-01 08:22:59,240 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2021-05-01 08:22:59,241 INFO L168 Benchmark]: Toolchain (without parser) took 1257.11 ms. Allocated memory is still 238.0 MB. Free memory was 202.8 MB in the beginning and 211.8 MB in the end (delta: -9.0 MB). There was no memory consumed. Max. memory is 8.0 GB.
[2021-05-01 08:22:59,242 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 238.0 MB. Free memory is still 219.2 MB. There was no memory consumed. Max. memory is 8.0 GB.
[2021-05-01 08:22:59,242 INFO L168 Benchmark]: CACSL2BoogieTranslator took 251.79 ms. Allocated memory is still 238.0 MB. Free memory was 202.6 MB in the beginning and 220.3 MB in the end (delta: -17.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 8.0 GB.
[2021-05-01 08:22:59,242 INFO L168 Benchmark]: Boogie Preprocessor took 40.71 ms. Allocated memory is still 238.0 MB. Free memory was 220.3 MB in the beginning and 218.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB.
[2021-05-01 08:22:59,243 INFO L168 Benchmark]: RCFGBuilder took 344.79 ms. Allocated memory is still 238.0 MB. Free memory was 218.9 MB in the beginning and 203.9 MB in the end (delta: 15.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB.
[2021-05-01 08:22:59,243 INFO L168 Benchmark]: TraceAbstraction took 612.75 ms. Allocated memory is still 238.0 MB. Free memory was 203.5 MB in the beginning and 211.8 MB in the end (delta: -8.3 MB). There was no memory consumed. Max. memory is 8.0 GB.
[2021-05-01 08:22:59,244 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.10 ms. Allocated memory is still 238.0 MB. Free memory is still 219.2 MB. There was no memory consumed. Max. memory is 8.0 GB.
* CACSL2BoogieTranslator took 251.79 ms. Allocated memory is still 238.0 MB. Free memory was 202.6 MB in the beginning and 220.3 MB in the end (delta: -17.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 8.0 GB.
* Boogie Preprocessor took 40.71 ms. Allocated memory is still 238.0 MB. Free memory was 220.3 MB in the beginning and 218.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB.
* RCFGBuilder took 344.79 ms. Allocated memory is still 238.0 MB. Free memory was 218.9 MB in the beginning and 203.9 MB in the end (delta: 15.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB.
* TraceAbstraction took 612.75 ms. Allocated memory is still 238.0 MB. Free memory was 203.5 MB in the beginning and 211.8 MB in the end (delta: -8.3 MB). There was no memory consumed. Max. memory is 8.0 GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable
Unable to prove that call to reach_error is unreachable
Reason: unable to decide satisfiability of path constraint.
Possible FailurePath:
[L20] int A, R;
[L21] long long u, v, r;
[L22] A = __VERIFIER_nondet_int()
[L23] CALL assume_abort_if_not(A>=0 && A<=2)
[L9] COND FALSE !(!cond)
[L23] RET assume_abort_if_not(A>=0 && A<=2)
[L24] R = __VERIFIER_nondet_int()
[L25] CALL assume_abort_if_not(R>=0 && R<=2)
[L9] COND FALSE !(!cond)
[L25] RET assume_abort_if_not(R>=0 && R<=2)
[L27] CALL assume_abort_if_not(((long long) R - 1) * ((long long) R - 1) < A)
[L9] COND FALSE !(!cond)
[L27] RET assume_abort_if_not(((long long) R - 1) * ((long long) R - 1) < A)
[L29] CALL assume_abort_if_not(A % 2 == 1)
[L9] COND FALSE !(!cond)
[L29] RET assume_abort_if_not(A % 2 == 1)
[L31] u = ((long long) 2 * R) + 1
[L32] v = 1
[L33] r = ((long long) R * R) - A
[L35] COND TRUE 1
[L36] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v)
[L12] COND TRUE !(cond)
[L14] reach_error()
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 6 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 566.9ms, OverallIterations: 2, TraceHistogramMax: 4, EmptinessCheckTime: 9.8ms, AutomataDifference: 156.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 30 SDtfs, 18 SDslu, 3 SDs, 0 SdLazy, 9 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 72.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=0, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 33.2ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available
RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces
Received shutdown request...