/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/acceleratedInterpolationWernerOverapprox_32.epf -i ../../../trunk/examples/svcomp/array-fpi/condgf.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 04:46:16,001 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 04:46:16,005 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 04:46:16,062 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-24 04:46:16,092 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 04:46:16,095 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 04:46:16,097 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 04:46:16,098 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 04:46:16,103 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 04:46:16,104 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 04:46:16,111 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 04:46:16,116 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 04:46:16,118 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 04:46:16,120 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 04:46:16,122 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 04:46:16,124 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 04:46:16,132 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-24 04:46:16,142 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-24 04:46:16,143 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-24 04:46:16,144 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-24 04:46:16,145 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-24 04:46:16,158 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 04:46:16,158 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 04:46:16,160 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 04:46:16,160 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 04:46:16,160 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 04:46:16,160 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 04:46:16,161 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 04:46:16,161 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 04:46:16,161 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 04:46:16,161 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 04:46:16,162 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 04:46:16,162 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 04:46:16,162 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 04:46:16,162 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 04:46:16,163 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 04:46:16,163 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 04:46:16,163 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 04:46:16,163 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 04:46:16,163 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 04:46:16,164 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 04:46:16,164 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 04:46:16,164 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 04:46:16,164 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-24 04:46:16,165 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-24 04:46:16,551 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 04:46:16,576 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 04:46:16,579 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 04:46:16,580 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 04:46:16,581 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 04:46:16,582 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/condgf.c [2021-02-24 04:46:16,655 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ee2c7121/858cbd1bda944711a167fffaf8d0e7ba/FLAG0de473c8d [2021-02-24 04:46:17,165 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 04:46:17,166 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/condgf.c [2021-02-24 04:46:17,174 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ee2c7121/858cbd1bda944711a167fffaf8d0e7ba/FLAG0de473c8d [2021-02-24 04:46:17,544 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ee2c7121/858cbd1bda944711a167fffaf8d0e7ba [2021-02-24 04:46:17,553 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 04:46:17,569 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 04:46:17,573 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 04:46:17,573 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 04:46:17,577 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 04:46:17,578 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:46:17" (1/1) ... [2021-02-24 04:46:17,580 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@262a3b78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:46:17, skipping insertion in model container [2021-02-24 04:46:17,580 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:46:17" (1/1) ... [2021-02-24 04:46:17,590 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 04:46:17,610 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 04:46:17,827 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/condgf.c[589,602] [2021-02-24 04:46:17,866 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:46:17,877 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 04:46:17,894 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/condgf.c[589,602] [2021-02-24 04:46:17,919 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:46:17,942 INFO L208 MainTranslator]: Completed translation [2021-02-24 04:46:17,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:46:17 WrapperNode [2021-02-24 04:46:17,943 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 04:46:17,944 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 04:46:17,944 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 04:46:17,944 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 04:46:17,960 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:46:17" (1/1) ... [2021-02-24 04:46:17,960 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:46:17" (1/1) ... [2021-02-24 04:46:17,979 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:46:17" (1/1) ... [2021-02-24 04:46:17,980 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:46:17" (1/1) ... [2021-02-24 04:46:18,002 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:46:17" (1/1) ... [2021-02-24 04:46:18,012 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:46:17" (1/1) ... [2021-02-24 04:46:18,016 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:46:17" (1/1) ... [2021-02-24 04:46:18,025 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 04:46:18,031 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 04:46:18,032 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 04:46:18,032 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 04:46:18,033 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:46:17" (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 [2021-02-24 04:46:18,139 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 04:46:18,139 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 04:46:18,140 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 04:46:18,140 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-24 04:46:18,140 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-24 04:46:18,141 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 04:46:18,141 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 04:46:18,142 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 04:46:18,142 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 04:46:18,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 04:46:18,143 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-24 04:46:18,143 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-24 04:46:18,143 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-24 04:46:18,144 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-24 04:46:18,144 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 04:46:18,145 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-24 04:46:18,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 04:46:18,146 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 04:46:18,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 04:46:18,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 04:46:18,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 04:46:18,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 04:46:18,719 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 04:46:18,719 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-02-24 04:46:18,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:46:18 BoogieIcfgContainer [2021-02-24 04:46:18,722 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 04:46:18,725 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 04:46:18,725 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 04:46:18,728 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 04:46:18,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 04:46:17" (1/3) ... [2021-02-24 04:46:18,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@478c409a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:46:18, skipping insertion in model container [2021-02-24 04:46:18,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:46:17" (2/3) ... [2021-02-24 04:46:18,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@478c409a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:46:18, skipping insertion in model container [2021-02-24 04:46:18,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:46:18" (3/3) ... [2021-02-24 04:46:18,732 INFO L111 eAbstractionObserver]: Analyzing ICFG condgf.c [2021-02-24 04:46:18,744 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 04:46:18,750 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 04:46:18,769 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 04:46:18,802 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 04:46:18,802 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 04:46:18,802 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-24 04:46:18,802 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 04:46:18,803 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 04:46:18,803 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 04:46:18,803 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 04:46:18,803 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 04:46:18,824 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states. [2021-02-24 04:46:18,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-02-24 04:46:18,839 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:46:18,840 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:46:18,840 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:46:18,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:46:18,850 INFO L82 PathProgramCache]: Analyzing trace with hash -2120485220, now seen corresponding path program 1 times [2021-02-24 04:46:18,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:46:18,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653401595] [2021-02-24 04:46:18,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:46:18,985 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:46:19,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:46:19,117 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:46:19,118 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:46:19,119 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:46:19,120 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:46:19,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:46:19,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:46:19,239 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:46:19,241 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:46:19,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-24 04:46:19,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:46:19,251 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:46:19,251 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:46:19,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:46:19,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653401595] [2021-02-24 04:46:19,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:46:19,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-24 04:46:19,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427084733] [2021-02-24 04:46:19,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-24 04:46:19,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:46:19,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-24 04:46:19,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 04:46:19,286 INFO L87 Difference]: Start difference. First operand 82 states. Second operand 3 states. [2021-02-24 04:46:19,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:46:19,481 INFO L93 Difference]: Finished difference Result 141 states and 162 transitions. [2021-02-24 04:46:19,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-24 04:46:19,482 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2021-02-24 04:46:19,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:46:19,491 INFO L225 Difference]: With dead ends: 141 [2021-02-24 04:46:19,491 INFO L226 Difference]: Without dead ends: 72 [2021-02-24 04:46:19,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 04:46:19,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-02-24 04:46:19,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-02-24 04:46:19,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-02-24 04:46:19,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2021-02-24 04:46:19,551 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 40 [2021-02-24 04:46:19,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:46:19,552 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2021-02-24 04:46:19,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-24 04:46:19,552 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2021-02-24 04:46:19,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-02-24 04:46:19,554 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:46:19,554 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:46:19,554 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 04:46:19,555 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:46:19,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:46:19,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1012737605, now seen corresponding path program 1 times [2021-02-24 04:46:19,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:46:19,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [132879072] [2021-02-24 04:46:19,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:46:19,561 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:46:19,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:46:19,652 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:46:19,652 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:46:19,654 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:46:19,654 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:46:19,665 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:46:19,666 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:46:19,675 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:46:19,676 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:46:19,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:46:19,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:46:19,720 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:46:19,720 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:46:19,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-24 04:46:19,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:46:19,727 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:46:19,728 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:46:19,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:46:19,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [132879072] [2021-02-24 04:46:19,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:46:19,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-24 04:46:19,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910957021] [2021-02-24 04:46:19,734 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-24 04:46:19,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:46:19,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-24 04:46:19,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-24 04:46:19,735 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 5 states. [2021-02-24 04:46:20,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:46:20,113 INFO L93 Difference]: Finished difference Result 142 states and 154 transitions. [2021-02-24 04:46:20,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-24 04:46:20,113 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 40 [2021-02-24 04:46:20,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:46:20,117 INFO L225 Difference]: With dead ends: 142 [2021-02-24 04:46:20,117 INFO L226 Difference]: Without dead ends: 103 [2021-02-24 04:46:20,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-02-24 04:46:20,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-02-24 04:46:20,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 75. [2021-02-24 04:46:20,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2021-02-24 04:46:20,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2021-02-24 04:46:20,141 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 40 [2021-02-24 04:46:20,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:46:20,141 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2021-02-24 04:46:20,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-24 04:46:20,142 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2021-02-24 04:46:20,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-02-24 04:46:20,144 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:46:20,144 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:46:20,145 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 04:46:20,145 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:46:20,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:46:20,146 INFO L82 PathProgramCache]: Analyzing trace with hash -800271576, now seen corresponding path program 1 times [2021-02-24 04:46:20,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:46:20,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1190347288] [2021-02-24 04:46:20,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:46:20,169 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:46:20,183 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 04:46:20,191 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:46:20,195 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 04:46:20,204 WARN L141 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size [2021-02-24 04:46:20,217 WARN L147 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size 13 [2021-02-24 04:46:20,225 WARN L141 QuantifierPusher]: treesize reduction 14, result has 68.2 percent of original size [2021-02-24 04:46:20,229 WARN L147 QuantifierPusher]: treesize reduction 14, result has 68.2 percent of original size 30 [2021-02-24 04:46:20,230 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-02-24 04:46:20,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 04:46:20,291 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 04:46:20,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 04:46:20,328 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 04:46:20,367 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-24 04:46:20,368 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-24 04:46:20,368 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-24 04:46:20,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 04:46:20 BoogieIcfgContainer [2021-02-24 04:46:20,387 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 04:46:20,389 INFO L168 Benchmark]: Toolchain (without parser) took 2832.08 ms. Allocated memory was 175.1 MB in the beginning and 215.0 MB in the end (delta: 39.8 MB). Free memory was 141.7 MB in the beginning and 147.0 MB in the end (delta: -5.3 MB). Peak memory consumption was 34.5 MB. Max. memory is 8.0 GB. [2021-02-24 04:46:20,390 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 175.1 MB. Free memory is still 159.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 04:46:20,391 INFO L168 Benchmark]: CACSL2BoogieTranslator took 370.64 ms. Allocated memory is still 175.1 MB. Free memory was 140.6 MB in the beginning and 130.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-24 04:46:20,391 INFO L168 Benchmark]: Boogie Preprocessor took 81.27 ms. Allocated memory is still 175.1 MB. Free memory was 130.5 MB in the beginning and 128.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-24 04:46:20,392 INFO L168 Benchmark]: RCFGBuilder took 690.47 ms. Allocated memory is still 175.1 MB. Free memory was 128.8 MB in the beginning and 143.8 MB in the end (delta: -15.0 MB). Peak memory consumption was 13.2 MB. Max. memory is 8.0 GB. [2021-02-24 04:46:20,393 INFO L168 Benchmark]: TraceAbstraction took 1662.79 ms. Allocated memory was 175.1 MB in the beginning and 215.0 MB in the end (delta: 39.8 MB). Free memory was 143.2 MB in the beginning and 147.0 MB in the end (delta: -3.8 MB). Peak memory consumption was 34.9 MB. Max. memory is 8.0 GB. [2021-02-24 04:46:20,396 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 175.1 MB. Free memory is still 159.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 370.64 ms. Allocated memory is still 175.1 MB. Free memory was 140.6 MB in the beginning and 130.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 81.27 ms. Allocated memory is still 175.1 MB. Free memory was 130.5 MB in the beginning and 128.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 690.47 ms. Allocated memory is still 175.1 MB. Free memory was 128.8 MB in the beginning and 143.8 MB in the end (delta: -15.0 MB). Peak memory consumption was 13.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1662.79 ms. Allocated memory was 175.1 MB in the beginning and 215.0 MB in the end (delta: 39.8 MB). Free memory was 143.2 MB in the beginning and 147.0 MB in the end (delta: -3.8 MB). Peak memory consumption was 34.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L13] COND FALSE !(!cond) [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L27] int i; [L28] long long sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] sum[0] = 0 [L32] i=0 [L32] COND TRUE i