/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/hard-u_unwindbound2.c
--------------------------------------------------------------------------------
This is Ultimate 0.2.1-dev-1a84f73
[2021-05-01 08:24:00,893 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2021-05-01 08:24:00,896 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2021-05-01 08:24:00,931 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2021-05-01 08:24:00,932 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2021-05-01 08:24:00,936 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2021-05-01 08:24:00,939 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
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[2021-05-01 08:24:00,970 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2021-05-01 08:24:00,975 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2021-05-01 08:24:00,976 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2021-05-01 08:24:00,979 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2021-05-01 08:24:00,985 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2021-05-01 08:24:00,987 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2021-05-01 08:24:00,989 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2021-05-01 08:24:00,993 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2021-05-01 08:24:00,996 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
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[2021-05-01 08:24:01,022 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2021-05-01 08:24:01,023 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 08:24:01,047 INFO L113 SettingsManager]: Loading preferences was successful
[2021-05-01 08:24:01,047 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2021-05-01 08:24:01,051 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2021-05-01 08:24:01,052 INFO L138 SettingsManager]: * sizeof long=4
[2021-05-01 08:24:01,052 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2021-05-01 08:24:01,052 INFO L138 SettingsManager]: * sizeof POINTER=4
[2021-05-01 08:24:01,052 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2021-05-01 08:24:01,052 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2021-05-01 08:24:01,053 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2021-05-01 08:24:01,053 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2021-05-01 08:24:01,054 INFO L138 SettingsManager]: * sizeof long double=12
[2021-05-01 08:24:01,054 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2021-05-01 08:24:01,054 INFO L138 SettingsManager]: * Use constant arrays=true
[2021-05-01 08:24:01,054 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2021-05-01 08:24:01,055 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2021-05-01 08:24:01,055 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2021-05-01 08:24:01,055 INFO L138 SettingsManager]: * To the following directory=./dump/
[2021-05-01 08:24:01,055 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2021-05-01 08:24:01,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-05-01 08:24:01,055 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2021-05-01 08:24:01,056 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation
[2021-05-01 08:24:01,056 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2021-05-01 08:24:01,056 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN
[2021-05-01 08:24:01,056 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
[2021-05-01 08:24:01,433 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2021-05-01 08:24:01,467 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2021-05-01 08:24:01,471 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2021-05-01 08:24:01,473 INFO L271 PluginConnector]: Initializing CDTParser...
[2021-05-01 08:24:01,473 INFO L275 PluginConnector]: CDTParser initialized
[2021-05-01 08:24:01,475 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound2.c
[2021-05-01 08:24:01,545 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6db82309/46c1f7090b1344d4903275b3e9693889/FLAG9fe0fd992
[2021-05-01 08:24:02,098 INFO L306 CDTParser]: Found 1 translation units.
[2021-05-01 08:24:02,098 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound2.c
[2021-05-01 08:24:02,106 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6db82309/46c1f7090b1344d4903275b3e9693889/FLAG9fe0fd992
[2021-05-01 08:24:02,457 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6db82309/46c1f7090b1344d4903275b3e9693889
[2021-05-01 08:24:02,459 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2021-05-01 08:24:02,461 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2021-05-01 08:24:02,477 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2021-05-01 08:24:02,478 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2021-05-01 08:24:02,482 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2021-05-01 08:24:02,483 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:24:02" (1/1) ...
[2021-05-01 08:24:02,484 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11bfdca2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:02, skipping insertion in model container
[2021-05-01 08:24:02,485 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:24:02" (1/1) ...
[2021-05-01 08:24:02,494 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2021-05-01 08:24:02,515 INFO L178 MainTranslator]: Built tables and reachable declarations
[2021-05-01 08:24:02,703 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/hard-u_unwindbound2.c[545,558]
[2021-05-01 08:24:02,737 INFO L206 PostProcessor]: Analyzing one entry point: main
[2021-05-01 08:24:02,754 INFO L203 MainTranslator]: Completed pre-run
[2021-05-01 08:24:02,772 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/hard-u_unwindbound2.c[545,558]
[2021-05-01 08:24:02,792 INFO L206 PostProcessor]: Analyzing one entry point: main
[2021-05-01 08:24:02,813 INFO L208 MainTranslator]: Completed translation
[2021-05-01 08:24:02,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:02 WrapperNode
[2021-05-01 08:24:02,814 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2021-05-01 08:24:02,817 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2021-05-01 08:24:02,817 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2021-05-01 08:24:02,818 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2021-05-01 08:24:02,860 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:02" (1/1) ...
[2021-05-01 08:24:02,861 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:02" (1/1) ...
[2021-05-01 08:24:02,907 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:02" (1/1) ...
[2021-05-01 08:24:02,908 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:02" (1/1) ...
[2021-05-01 08:24:02,914 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:02" (1/1) ...
[2021-05-01 08:24:02,938 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:02" (1/1) ...
[2021-05-01 08:24:02,946 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:02" (1/1) ...
[2021-05-01 08:24:02,948 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2021-05-01 08:24:02,949 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2021-05-01 08:24:02,949 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2021-05-01 08:24:02,949 INFO L275 PluginConnector]: RCFGBuilder initialized
[2021-05-01 08:24:02,950 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:02" (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 08:24:03,046 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2021-05-01 08:24:03,046 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2021-05-01 08:24:03,046 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error
[2021-05-01 08:24:03,047 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2021-05-01 08:24:03,048 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2021-05-01 08:24:03,048 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2021-05-01 08:24:03,048 INFO L130 BoogieDeclarations]: Found specification of procedure abort
[2021-05-01 08:24:03,048 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail
[2021-05-01 08:24:03,049 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error
[2021-05-01 08:24:03,049 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2021-05-01 08:24:03,049 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int
[2021-05-01 08:24:03,050 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2021-05-01 08:24:03,050 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2021-05-01 08:24:03,050 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2021-05-01 08:24:03,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2021-05-01 08:24:03,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int
[2021-05-01 08:24:03,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2021-05-01 08:24:03,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~int
[2021-05-01 08:24:03,052 INFO L130 BoogieDeclarations]: Found specification of procedure read~int
[2021-05-01 08:24:03,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2021-05-01 08:24:03,429 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2021-05-01 08:24:03,430 INFO L299 CfgBuilder]: Removed 2 assume(true) statements.
[2021-05-01 08:24:03,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:24:03 BoogieIcfgContainer
[2021-05-01 08:24:03,433 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2021-05-01 08:24:03,435 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2021-05-01 08:24:03,435 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2021-05-01 08:24:03,441 INFO L275 PluginConnector]: TraceAbstraction initialized
[2021-05-01 08:24:03,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.05 08:24:02" (1/3) ...
[2021-05-01 08:24:03,443 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b0fa0a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:24:03, skipping insertion in model container
[2021-05-01 08:24:03,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:02" (2/3) ...
[2021-05-01 08:24:03,443 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b0fa0a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:24:03, skipping insertion in model container
[2021-05-01 08:24:03,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:24:03" (3/3) ...
[2021-05-01 08:24:03,445 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_unwindbound2.c
[2021-05-01 08:24:03,469 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION
[2021-05-01 08:24:03,486 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2021-05-01 08:24:03,511 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2021-05-01 08:24:03,551 INFO L376 AbstractCegarLoop]: Interprodecural is true
[2021-05-01 08:24:03,551 INFO L377 AbstractCegarLoop]: Hoare is true
[2021-05-01 08:24:03,551 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation
[2021-05-01 08:24:03,551 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2021-05-01 08:24:03,551 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2021-05-01 08:24:03,551 INFO L381 AbstractCegarLoop]: Difference is false
[2021-05-01 08:24:03,552 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2021-05-01 08:24:03,552 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2021-05-01 08:24:03,571 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 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 08:24:03,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19
[2021-05-01 08:24:03,581 INFO L511 BasicCegarLoop]: Found error trace
[2021-05-01 08:24:03,582 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 08:24:03,583 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-05-01 08:24:03,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-05-01 08:24:03,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1191571617, now seen corresponding path program 1 times
[2021-05-01 08:24:03,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2021-05-01 08:24:03,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1002539029]
[2021-05-01 08:24:03,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-05-01 08:24:03,674 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2021-05-01 08:24:03,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-01 08:24:03,867 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:24:03,870 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:24:03,872 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:24:03,875 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:24:03,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2021-05-01 08:24:04,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-01 08:24:04,041 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:24:04,042 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:24:04,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2021-05-01 08:24:04,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-01 08:24:04,055 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:24:04,057 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:24:04,061 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:24:04,063 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:24:04,065 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 08:24:04,069 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2021-05-01 08:24:04,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1002539029]
[2021-05-01 08:24:04,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1002539029] provided 1 perfect and 0 imperfect interpolant sequences
[2021-05-01 08:24:04,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-05-01 08:24:04,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-05-01 08:24:04,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416919410]
[2021-05-01 08:24:04,084 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states
[2021-05-01 08:24:04,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2021-05-01 08:24:04,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-05-01 08:24:04,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-05-01 08:24:04,118 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 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 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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 08:24:04,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-05-01 08:24:04,541 INFO L93 Difference]: Finished difference Result 66 states and 101 transitions.
[2021-05-01 08:24:04,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2021-05-01 08:24:04,544 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, (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 18
[2021-05-01 08:24:04,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-05-01 08:24:04,555 INFO L225 Difference]: With dead ends: 66
[2021-05-01 08:24:04,555 INFO L226 Difference]: Without dead ends: 33
[2021-05-01 08:24:04,563 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 122.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-05-01 08:24:04,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states.
[2021-05-01 08:24:04,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32.
[2021-05-01 08:24:04,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 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 08:24:04,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions.
[2021-05-01 08:24:04,646 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18
[2021-05-01 08:24:04,647 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-05-01 08:24:04,647 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions.
[2021-05-01 08:24:04,647 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, (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 08:24:04,647 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions.
[2021-05-01 08:24:04,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19
[2021-05-01 08:24:04,648 INFO L511 BasicCegarLoop]: Found error trace
[2021-05-01 08:24:04,648 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 08:24:04,650 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2021-05-01 08:24:04,650 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-05-01 08:24:04,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-05-01 08:24:04,653 INFO L82 PathProgramCache]: Analyzing trace with hash 336486197, now seen corresponding path program 1 times
[2021-05-01 08:24:04,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2021-05-01 08:24:04,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [176796408]
[2021-05-01 08:24:04,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-05-01 08:24:04,662 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2021-05-01 08:24:04,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-01 08:24:04,804 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:24:04,805 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:24:04,809 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:24:04,810 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3
[2021-05-01 08:24:04,818 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:24:04,819 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4
[2021-05-01 08:24:04,829 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:24:04,831 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4
[2021-05-01 08:24:04,845 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:24:04,848 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:24:04,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2021-05-01 08:24:04,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-01 08:24:04,928 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:24:04,929 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:24:04,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2021-05-01 08:24:04,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-01 08:24:04,935 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:24:04,936 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:24:04,937 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 08:24:04,937 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2021-05-01 08:24:04,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [176796408]
[2021-05-01 08:24:04,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [176796408] provided 1 perfect and 0 imperfect interpolant sequences
[2021-05-01 08:24:04,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-05-01 08:24:04,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2021-05-01 08:24:04,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725902622]
[2021-05-01 08:24:04,939 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states
[2021-05-01 08:24:04,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2021-05-01 08:24:04,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2021-05-01 08:24:04,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2021-05-01 08:24:04,940 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2)
[2021-05-01 08:24:05,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-05-01 08:24:05,365 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions.
[2021-05-01 08:24:05,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states.
[2021-05-01 08:24:05,366 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18
[2021-05-01 08:24:05,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-05-01 08:24:05,368 INFO L225 Difference]: With dead ends: 47
[2021-05-01 08:24:05,369 INFO L226 Difference]: Without dead ends: 45
[2021-05-01 08:24:05,370 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 243.1ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90
[2021-05-01 08:24:05,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states.
[2021-05-01 08:24:05,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36.
[2021-05-01 08:24:05,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8)
[2021-05-01 08:24:05,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions.
[2021-05-01 08:24:05,385 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18
[2021-05-01 08:24:05,386 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-05-01 08:24:05,386 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions.
[2021-05-01 08:24:05,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2)
[2021-05-01 08:24:05,386 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions.
[2021-05-01 08:24:05,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21
[2021-05-01 08:24:05,387 INFO L511 BasicCegarLoop]: Found error trace
[2021-05-01 08:24:05,387 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-05-01 08:24:05,387 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2021-05-01 08:24:05,388 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-05-01 08:24:05,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-05-01 08:24:05,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1819267188, now seen corresponding path program 1 times
[2021-05-01 08:24:05,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2021-05-01 08:24:05,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1075393964]
[2021-05-01 08:24:05,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-05-01 08:24:05,392 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2021-05-01 08:24:05,406 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility
[2021-05-01 08:24:05,407 INFO L620 BasicCegarLoop]: Counterexample might be feasible
[2021-05-01 08:24:05,413 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2021-05-01 08:24:05,434 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually.
[2021-05-01 08:24:05,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 08:24:05 BoogieIcfgContainer
[2021-05-01 08:24:05,435 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2021-05-01 08:24:05,436 INFO L168 Benchmark]: Toolchain (without parser) took 2975.16 ms. Allocated memory is still 175.1 MB. Free memory was 141.2 MB in the beginning and 115.5 MB in the end (delta: 25.7 MB). Peak memory consumption was 26.7 MB. Max. memory is 8.0 GB.
[2021-05-01 08:24:05,437 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 175.1 MB. Free memory was 158.0 MB in the beginning and 157.9 MB in the end (delta: 105.2 kB). There was no memory consumed. Max. memory is 8.0 GB.
[2021-05-01 08:24:05,438 INFO L168 Benchmark]: CACSL2BoogieTranslator took 338.16 ms. Allocated memory is still 175.1 MB. Free memory was 141.0 MB in the beginning and 131.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB.
[2021-05-01 08:24:05,438 INFO L168 Benchmark]: Boogie Preprocessor took 131.50 ms. Allocated memory is still 175.1 MB. Free memory was 131.1 MB in the beginning and 158.9 MB in the end (delta: -27.8 MB). Peak memory consumption was 3.2 MB. Max. memory is 8.0 GB.
[2021-05-01 08:24:05,439 INFO L168 Benchmark]: RCFGBuilder took 483.74 ms. Allocated memory is still 175.1 MB. Free memory was 158.9 MB in the beginning and 142.1 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB.
[2021-05-01 08:24:05,439 INFO L168 Benchmark]: TraceAbstraction took 2000.11 ms. Allocated memory is still 175.1 MB. Free memory was 142.1 MB in the beginning and 115.5 MB in the end (delta: 26.6 MB). Peak memory consumption was 27.7 MB. Max. memory is 8.0 GB.
[2021-05-01 08:24:05,442 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.17 ms. Allocated memory is still 175.1 MB. Free memory was 158.0 MB in the beginning and 157.9 MB in the end (delta: 105.2 kB). There was no memory consumed. Max. memory is 8.0 GB.
* CACSL2BoogieTranslator took 338.16 ms. Allocated memory is still 175.1 MB. Free memory was 141.0 MB in the beginning and 131.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB.
* Boogie Preprocessor took 131.50 ms. Allocated memory is still 175.1 MB. Free memory was 131.1 MB in the beginning and 158.9 MB in the end (delta: -27.8 MB). Peak memory consumption was 3.2 MB. Max. memory is 8.0 GB.
* RCFGBuilder took 483.74 ms. Allocated memory is still 175.1 MB. Free memory was 158.9 MB in the beginning and 142.1 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB.
* TraceAbstraction took 2000.11 ms. Allocated memory is still 175.1 MB. Free memory was 142.1 MB in the beginning and 115.5 MB in the end (delta: 26.6 MB). Peak memory consumption was 27.7 MB. 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] unsigned int A, B;
[L25] unsigned int r, d, p, q;
[L26] A = __VERIFIER_nondet_unsigned_int()
[L27] B = __VERIFIER_nondet_unsigned_int()
[L28] CALL assume_abort_if_not(B >= 1)
[L12] COND FALSE !(!cond)
[L28] RET assume_abort_if_not(B >= 1)
[L30] r = A
[L31] d = B
[L32] p = 1
[L33] q = 0
[L35] EXPR counter++
[L35] COND FALSE !(counter++<2)
[L45] EXPR counter++
[L45] COND FALSE !(counter++<2)
[L59] CALL __VERIFIER_assert(A == d*q + r)
[L15] COND TRUE !(cond)
[L17] reach_error()
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 6 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 1865.2ms, OverallIterations: 3, TraceHistogramMax: 1, EmptinessCheckTime: 17.2ms, AutomataDifference: 908.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 13.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 82 SDtfs, 38 SDslu, 80 SDs, 0 SdLazy, 100 SolverSat, 23 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 432.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 365.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=0, InterpolantAutomatonStates: 11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 79.0ms AutomataMinimizationTime, 2 MinimizatonAttempts, 10 StatesRemovedByMinimization, 2 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...