/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/cohendiv-ll_unwindbound20.c
--------------------------------------------------------------------------------
This is Ultimate 0.2.1-dev-1a84f73
[2021-05-01 08:20:16,085 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2021-05-01 08:20:16,088 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2021-05-01 08:20:16,120 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2021-05-01 08:20:16,120 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2021-05-01 08:20:16,122 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2021-05-01 08:20:16,123 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
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[2021-05-01 08:20:16,132 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2021-05-01 08:20:16,133 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2021-05-01 08:20:16,134 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2021-05-01 08:20:16,135 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2021-05-01 08:20:16,136 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2021-05-01 08:20:16,137 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2021-05-01 08:20:16,139 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2021-05-01 08:20:16,140 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2021-05-01 08:20:16,141 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2021-05-01 08:20:16,142 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
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[2021-05-01 08:20:16,164 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
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[2021-05-01 08:20:16,165 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2021-05-01 08:20:16,173 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 08:20:16,193 INFO L113 SettingsManager]: Loading preferences was successful
[2021-05-01 08:20:16,194 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2021-05-01 08:20:16,197 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2021-05-01 08:20:16,198 INFO L138 SettingsManager]: * sizeof long=4
[2021-05-01 08:20:16,198 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2021-05-01 08:20:16,198 INFO L138 SettingsManager]: * sizeof POINTER=4
[2021-05-01 08:20:16,199 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2021-05-01 08:20:16,199 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2021-05-01 08:20:16,199 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2021-05-01 08:20:16,199 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2021-05-01 08:20:16,200 INFO L138 SettingsManager]: * sizeof long double=12
[2021-05-01 08:20:16,200 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2021-05-01 08:20:16,200 INFO L138 SettingsManager]: * Use constant arrays=true
[2021-05-01 08:20:16,200 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2021-05-01 08:20:16,200 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2021-05-01 08:20:16,201 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2021-05-01 08:20:16,201 INFO L138 SettingsManager]: * To the following directory=./dump/
[2021-05-01 08:20:16,201 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2021-05-01 08:20:16,201 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-05-01 08:20:16,201 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2021-05-01 08:20:16,201 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation
[2021-05-01 08:20:16,201 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2021-05-01 08:20:16,201 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN
[2021-05-01 08:20:16,201 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
[2021-05-01 08:20:16,541 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2021-05-01 08:20:16,565 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2021-05-01 08:20:16,568 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2021-05-01 08:20:16,569 INFO L271 PluginConnector]: Initializing CDTParser...
[2021-05-01 08:20:16,572 INFO L275 PluginConnector]: CDTParser initialized
[2021-05-01 08:20:16,573 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound20.c
[2021-05-01 08:20:16,654 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09696d0d6/eae0300a59294b5683d309c36b78940b/FLAGb96938d2d
[2021-05-01 08:20:17,218 INFO L306 CDTParser]: Found 1 translation units.
[2021-05-01 08:20:17,218 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound20.c
[2021-05-01 08:20:17,226 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09696d0d6/eae0300a59294b5683d309c36b78940b/FLAGb96938d2d
[2021-05-01 08:20:17,618 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09696d0d6/eae0300a59294b5683d309c36b78940b
[2021-05-01 08:20:17,621 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2021-05-01 08:20:17,623 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2021-05-01 08:20:17,625 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2021-05-01 08:20:17,625 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2021-05-01 08:20:17,628 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2021-05-01 08:20:17,629 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:20:17" (1/1) ...
[2021-05-01 08:20:17,631 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5123803f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:20:17, skipping insertion in model container
[2021-05-01 08:20:17,631 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:20:17" (1/1) ...
[2021-05-01 08:20:17,638 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2021-05-01 08:20:17,655 INFO L178 MainTranslator]: Built tables and reachable declarations
[2021-05-01 08:20:17,763 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/cohendiv-ll_unwindbound20.c[576,589]
[2021-05-01 08:20:17,780 INFO L206 PostProcessor]: Analyzing one entry point: main
[2021-05-01 08:20:17,789 INFO L203 MainTranslator]: Completed pre-run
[2021-05-01 08:20:17,800 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/cohendiv-ll_unwindbound20.c[576,589]
[2021-05-01 08:20:17,805 INFO L206 PostProcessor]: Analyzing one entry point: main
[2021-05-01 08:20:17,818 INFO L208 MainTranslator]: Completed translation
[2021-05-01 08:20:17,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:20:17 WrapperNode
[2021-05-01 08:20:17,818 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2021-05-01 08:20:17,819 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2021-05-01 08:20:17,820 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2021-05-01 08:20:17,820 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2021-05-01 08:20:17,829 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:20:17" (1/1) ...
[2021-05-01 08:20:17,829 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:20:17" (1/1) ...
[2021-05-01 08:20:17,836 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:20:17" (1/1) ...
[2021-05-01 08:20:17,836 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:20:17" (1/1) ...
[2021-05-01 08:20:17,883 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:20:17" (1/1) ...
[2021-05-01 08:20:17,887 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:20:17" (1/1) ...
[2021-05-01 08:20:17,889 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:20:17" (1/1) ...
[2021-05-01 08:20:17,891 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2021-05-01 08:20:17,894 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2021-05-01 08:20:17,894 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2021-05-01 08:20:17,894 INFO L275 PluginConnector]: RCFGBuilder initialized
[2021-05-01 08:20:17,897 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:20:17" (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 08:20:17,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2021-05-01 08:20:17,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2021-05-01 08:20:17,985 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error
[2021-05-01 08:20:17,986 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2021-05-01 08:20:17,986 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2021-05-01 08:20:17,986 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2021-05-01 08:20:17,986 INFO L130 BoogieDeclarations]: Found specification of procedure abort
[2021-05-01 08:20:17,986 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail
[2021-05-01 08:20:17,986 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error
[2021-05-01 08:20:17,986 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2021-05-01 08:20:17,986 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2021-05-01 08:20:17,986 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2021-05-01 08:20:17,986 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2021-05-01 08:20:17,986 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2021-05-01 08:20:17,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2021-05-01 08:20:17,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int
[2021-05-01 08:20:17,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2021-05-01 08:20:17,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~int
[2021-05-01 08:20:17,987 INFO L130 BoogieDeclarations]: Found specification of procedure read~int
[2021-05-01 08:20:17,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2021-05-01 08:20:18,298 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2021-05-01 08:20:18,299 INFO L299 CfgBuilder]: Removed 2 assume(true) statements.
[2021-05-01 08:20:18,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:20:18 BoogieIcfgContainer
[2021-05-01 08:20:18,300 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2021-05-01 08:20:18,302 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2021-05-01 08:20:18,302 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2021-05-01 08:20:18,305 INFO L275 PluginConnector]: TraceAbstraction initialized
[2021-05-01 08:20:18,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.05 08:20:17" (1/3) ...
[2021-05-01 08:20:18,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40a280da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:20:18, skipping insertion in model container
[2021-05-01 08:20:18,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:20:17" (2/3) ...
[2021-05-01 08:20:18,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40a280da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:20:18, skipping insertion in model container
[2021-05-01 08:20:18,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:20:18" (3/3) ...
[2021-05-01 08:20:18,308 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_unwindbound20.c
[2021-05-01 08:20:18,314 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION
[2021-05-01 08:20:18,318 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2021-05-01 08:20:18,334 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2021-05-01 08:20:18,363 INFO L376 AbstractCegarLoop]: Interprodecural is true
[2021-05-01 08:20:18,363 INFO L377 AbstractCegarLoop]: Hoare is true
[2021-05-01 08:20:18,363 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation
[2021-05-01 08:20:18,363 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2021-05-01 08:20:18,363 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2021-05-01 08:20:18,364 INFO L381 AbstractCegarLoop]: Difference is false
[2021-05-01 08:20:18,364 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2021-05-01 08:20:18,364 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2021-05-01 08:20:18,377 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10)
[2021-05-01 08:20:18,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2021-05-01 08:20:18,384 INFO L511 BasicCegarLoop]: Found error trace
[2021-05-01 08:20:18,384 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-05-01 08:20:18,385 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-05-01 08:20:18,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-05-01 08:20:18,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1588022502, now seen corresponding path program 1 times
[2021-05-01 08:20:18,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2021-05-01 08:20:18,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1394009148]
[2021-05-01 08:20:18,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-05-01 08:20:18,484 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2021-05-01 08:20:18,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-01 08:20:18,636 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:20:18,638 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:20:18,639 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:20:18,641 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:20:18,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2021-05-01 08:20:18,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-01 08:20:18,715 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:20:18,716 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:20:18,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2021-05-01 08:20:18,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-01 08:20:18,726 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:20:18,728 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:20:18,729 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:20:18,730 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:20:18,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-05-01 08:20:18,743 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2021-05-01 08:20:18,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1394009148]
[2021-05-01 08:20:18,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1394009148] provided 1 perfect and 0 imperfect interpolant sequences
[2021-05-01 08:20:18,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-05-01 08:20:18,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-05-01 08:20:18,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306085582]
[2021-05-01 08:20:18,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states
[2021-05-01 08:20:18,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2021-05-01 08:20:18,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-05-01 08:20:18,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-05-01 08:20:18,774 INFO L87 Difference]: Start difference. First operand has 38 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2)
[2021-05-01 08:20:18,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-05-01 08:20:18,959 INFO L93 Difference]: Finished difference Result 68 states and 101 transitions.
[2021-05-01 08:20:18,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2021-05-01 08:20:18,961 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17
[2021-05-01 08:20:18,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-05-01 08:20:18,969 INFO L225 Difference]: With dead ends: 68
[2021-05-01 08:20:18,969 INFO L226 Difference]: Without dead ends: 34
[2021-05-01 08:20:18,977 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-05-01 08:20:19,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states.
[2021-05-01 08:20:19,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33.
[2021-05-01 08:20:19,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8)
[2021-05-01 08:20:19,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions.
[2021-05-01 08:20:19,064 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 17
[2021-05-01 08:20:19,065 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-05-01 08:20:19,065 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions.
[2021-05-01 08:20:19,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2)
[2021-05-01 08:20:19,065 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions.
[2021-05-01 08:20:19,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19
[2021-05-01 08:20:19,066 INFO L511 BasicCegarLoop]: Found error trace
[2021-05-01 08:20:19,066 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-05-01 08:20:19,066 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2021-05-01 08:20:19,066 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-05-01 08:20:19,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-05-01 08:20:19,067 INFO L82 PathProgramCache]: Analyzing trace with hash 766070672, now seen corresponding path program 1 times
[2021-05-01 08:20:19,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2021-05-01 08:20:19,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [462358130]
[2021-05-01 08:20:19,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-05-01 08:20:19,069 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2021-05-01 08:20:19,102 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility
[2021-05-01 08:20:19,102 INFO L620 BasicCegarLoop]: Counterexample might be feasible
[2021-05-01 08:20:19,109 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2021-05-01 08:20:19,127 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually.
[2021-05-01 08:20:19,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 08:20:19 BoogieIcfgContainer
[2021-05-01 08:20:19,127 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2021-05-01 08:20:19,129 INFO L168 Benchmark]: Toolchain (without parser) took 1505.75 ms. Allocated memory is still 178.3 MB. Free memory was 143.7 MB in the beginning and 154.7 MB in the end (delta: -11.0 MB). There was no memory consumed. Max. memory is 8.0 GB.
[2021-05-01 08:20:19,131 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 178.3 MB. Free memory is still 160.6 MB. There was no memory consumed. Max. memory is 8.0 GB.
[2021-05-01 08:20:19,132 INFO L168 Benchmark]: CACSL2BoogieTranslator took 193.66 ms. Allocated memory is still 178.3 MB. Free memory was 143.6 MB in the beginning and 133.7 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB.
[2021-05-01 08:20:19,133 INFO L168 Benchmark]: Boogie Preprocessor took 71.74 ms. Allocated memory is still 178.3 MB. Free memory was 133.6 MB in the beginning and 162.3 MB in the end (delta: -28.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB.
[2021-05-01 08:20:19,134 INFO L168 Benchmark]: RCFGBuilder took 406.83 ms. Allocated memory is still 178.3 MB. Free memory was 162.3 MB in the beginning and 146.1 MB in the end (delta: 16.1 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB.
[2021-05-01 08:20:19,134 INFO L168 Benchmark]: TraceAbstraction took 825.55 ms. Allocated memory is still 178.3 MB. Free memory was 145.8 MB in the beginning and 154.7 MB in the end (delta: -9.0 MB). There was no memory consumed. Max. memory is 8.0 GB.
[2021-05-01 08:20:19,140 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.20 ms. Allocated memory is still 178.3 MB. Free memory is still 160.6 MB. There was no memory consumed. Max. memory is 8.0 GB.
* CACSL2BoogieTranslator took 193.66 ms. Allocated memory is still 178.3 MB. Free memory was 143.6 MB in the beginning and 133.7 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB.
* Boogie Preprocessor took 71.74 ms. Allocated memory is still 178.3 MB. Free memory was 133.6 MB in the beginning and 162.3 MB in the end (delta: -28.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB.
* RCFGBuilder took 406.83 ms. Allocated memory is still 178.3 MB. Free memory was 162.3 MB in the beginning and 146.1 MB in the end (delta: 16.1 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB.
* TraceAbstraction took 825.55 ms. Allocated memory is still 178.3 MB. Free memory was 145.8 MB in the beginning and 154.7 MB in the end (delta: -9.0 MB). There was no memory consumed. Max. memory is 8.0 GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- UnprovableResult [Line: 17]: 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:
[L22] int counter = 0;
[L24] int x, y;
[L25] long long q, r, a, b;
[L27] x = __VERIFIER_nondet_int()
[L28] y = __VERIFIER_nondet_int()
[L30] CALL assume_abort_if_not(y >= 1)
[L12] COND FALSE !(!cond)
[L30] RET assume_abort_if_not(y >= 1)
[L32] q = 0
[L33] r = x
[L34] a = 0
[L35] b = 0
[L37] EXPR counter++
[L37] COND FALSE !(counter++<20)
[L63] CALL __VERIFIER_assert(x == q*y + r)
[L15] COND TRUE !(cond)
[L17] reach_error()
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 6 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 749.2ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 11.3ms, AutomataDifference: 222.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 44 SDtfs, 10 SDslu, 4 SDs, 0 SdLazy, 25 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 86.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred 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: 50.0ms AutomataMinimizationTime, 1 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 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...