/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/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-new/count_by_1_variant.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 18:59:59,262 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 18:59:59,265 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 18:59:59,299 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 18:59:59,312 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 18:59:59,313 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 18:59:59,314 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 18:59:59,316 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 18:59:59,329 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 18:59:59,333 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 18:59:59,337 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 18:59:59,340 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 18:59:59,347 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 18:59:59,350 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 18:59:59,352 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 18:59:59,354 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 18:59:59,360 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 18:59:59,382 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 18:59:59,383 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 18:59:59,384 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 18:59:59,385 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 18:59:59,412 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 18:59:59,412 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 18:59:59,417 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 18:59:59,417 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 18:59:59,417 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 18:59:59,418 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 18:59:59,418 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 18:59:59,418 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 18:59:59,418 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 18:59:59,418 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 18:59:59,420 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 18:59:59,420 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 18:59:59,420 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 18:59:59,420 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 18:59:59,421 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 18:59:59,421 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 18:59:59,421 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 18:59:59,421 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 18:59:59,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 18:59:59,422 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 18:59:59,422 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 18:59:59,422 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 18:59:59,422 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 18:59:59,854 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 18:59:59,882 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 18:59:59,886 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 18:59:59,888 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 18:59:59,889 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 18:59:59,890 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/count_by_1_variant.i [2021-02-23 18:59:59,967 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65270d01d/415f6ec2739448d6886900e508dbb8be/FLAG14a84b0b3 [2021-02-23 19:00:00,739 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 19:00:00,740 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_1_variant.i [2021-02-23 19:00:00,748 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65270d01d/415f6ec2739448d6886900e508dbb8be/FLAG14a84b0b3 [2021-02-23 19:00:01,076 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65270d01d/415f6ec2739448d6886900e508dbb8be [2021-02-23 19:00:01,080 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 19:00:01,095 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 19:00:01,097 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 19:00:01,097 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 19:00:01,101 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 19:00:01,102 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 07:00:01" (1/1) ... [2021-02-23 19:00:01,104 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ab40ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:00:01, skipping insertion in model container [2021-02-23 19:00:01,104 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 07:00:01" (1/1) ... [2021-02-23 19:00:01,113 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 19:00:01,129 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 19:00:01,315 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_1_variant.i[891,904] [2021-02-23 19:00:01,325 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 19:00:01,336 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 19:00:01,351 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_1_variant.i[891,904] [2021-02-23 19:00:01,354 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 19:00:01,371 INFO L208 MainTranslator]: Completed translation [2021-02-23 19:00:01,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:00:01 WrapperNode [2021-02-23 19:00:01,372 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 19:00:01,373 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 19:00:01,373 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 19:00:01,374 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 19:00:01,387 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:00:01" (1/1) ... [2021-02-23 19:00:01,387 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:00:01" (1/1) ... [2021-02-23 19:00:01,394 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:00:01" (1/1) ... [2021-02-23 19:00:01,395 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:00:01" (1/1) ... [2021-02-23 19:00:01,400 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:00:01" (1/1) ... [2021-02-23 19:00:01,405 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:00:01" (1/1) ... [2021-02-23 19:00:01,407 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:00:01" (1/1) ... [2021-02-23 19:00:01,409 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 19:00:01,410 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 19:00:01,410 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 19:00:01,410 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 19:00:01,411 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:00:01" (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 [2021-02-23 19:00:01,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 19:00:01,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 19:00:01,513 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 19:00:01,513 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-23 19:00:01,513 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-23 19:00:01,513 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 19:00:01,513 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 19:00:01,513 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 19:00:01,514 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-23 19:00:01,514 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-23 19:00:01,514 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 19:00:01,514 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 19:00:01,514 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-23 19:00:01,514 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-23 19:00:01,515 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 19:00:01,515 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 19:00:01,515 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 19:00:01,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 19:00:01,515 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 19:00:01,516 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 19:00:01,516 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 19:00:01,516 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 19:00:01,787 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 19:00:01,788 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-23 19:00:01,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 07:00:01 BoogieIcfgContainer [2021-02-23 19:00:01,791 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 19:00:01,793 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 19:00:01,793 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 19:00:01,797 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 19:00:01,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 07:00:01" (1/3) ... [2021-02-23 19:00:01,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@387e045c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 07:00:01, skipping insertion in model container [2021-02-23 19:00:01,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:00:01" (2/3) ... [2021-02-23 19:00:01,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@387e045c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 07:00:01, skipping insertion in model container [2021-02-23 19:00:01,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 07:00:01" (3/3) ... [2021-02-23 19:00:01,801 INFO L111 eAbstractionObserver]: Analyzing ICFG count_by_1_variant.i [2021-02-23 19:00:01,810 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 19:00:01,816 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 19:00:01,848 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 19:00:01,905 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 19:00:01,910 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 19:00:01,910 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 19:00:01,911 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 19:00:01,911 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 19:00:01,911 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 19:00:01,911 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 19:00:01,911 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 19:00:01,951 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2021-02-23 19:00:01,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-23 19:00:01,971 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:00:01,972 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:00:01,972 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:00:01,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:00:01,981 INFO L82 PathProgramCache]: Analyzing trace with hash -86411315, now seen corresponding path program 1 times [2021-02-23 19:00:01,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:00:01,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1885495112] [2021-02-23 19:00:01,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:00:02,120 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:00:02,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:00:02,388 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:02,390 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:00:02,403 WARN L141 QuantifierPusher]: treesize reduction 9, result has 25.0 percent of original size [2021-02-23 19:00:02,404 WARN L147 QuantifierPusher]: treesize reduction 9, result has 25.0 percent of original size 3 [2021-02-23 19:00:02,418 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:02,419 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:00:02,426 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:02,427 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:00:02,435 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:02,437 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:00:02,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:00:02,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:00:02,504 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:02,505 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:00:02,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:00:02,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1885495112] [2021-02-23 19:00:02,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:00:02,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 19:00:02,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591721596] [2021-02-23 19:00:02,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 19:00:02,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:00:02,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 19:00:02,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-23 19:00:02,540 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 6 states. [2021-02-23 19:00:02,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:00:02,854 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2021-02-23 19:00:02,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-23 19:00:02,857 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2021-02-23 19:00:02,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:00:02,865 INFO L225 Difference]: With dead ends: 54 [2021-02-23 19:00:02,866 INFO L226 Difference]: Without dead ends: 32 [2021-02-23 19:00:02,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-02-23 19:00:02,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-02-23 19:00:02,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2021-02-23 19:00:02,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-02-23 19:00:02,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2021-02-23 19:00:02,927 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 18 [2021-02-23 19:00:02,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:00:02,928 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2021-02-23 19:00:02,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 19:00:02,928 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2021-02-23 19:00:02,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-23 19:00:02,929 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:00:02,929 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:00:02,930 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 19:00:02,930 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:00:02,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:00:02,931 INFO L82 PathProgramCache]: Analyzing trace with hash -674484509, now seen corresponding path program 1 times [2021-02-23 19:00:02,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:00:02,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [373236828] [2021-02-23 19:00:02,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:00:05,065 WARN L141 QuantifierPusher]: treesize reduction 9, result has 83.6 percent of original size [2021-02-23 19:00:05,106 WARN L147 QuantifierPusher]: treesize reduction 9, result has 83.6 percent of original size 46 [2021-02-23 19:00:05,115 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:05,116 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:00:05,116 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-23 19:00:05,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 19:00:05,175 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 19:00:05,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 19:00:05,221 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 19:00:05,247 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-23 19:00:05,248 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 19:00:05,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 19:00:05,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 07:00:05 BoogieIcfgContainer [2021-02-23 19:00:05,266 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 19:00:05,268 INFO L168 Benchmark]: Toolchain (without parser) took 4184.79 ms. Allocated memory is still 151.0 MB. Free memory was 128.1 MB in the beginning and 113.5 MB in the end (delta: 14.6 MB). Peak memory consumption was 15.5 MB. Max. memory is 8.0 GB. [2021-02-23 19:00:05,268 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 151.0 MB. Free memory is still 124.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 19:00:05,269 INFO L168 Benchmark]: CACSL2BoogieTranslator took 275.49 ms. Allocated memory is still 151.0 MB. Free memory was 127.1 MB in the beginning and 117.5 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-23 19:00:05,270 INFO L168 Benchmark]: Boogie Preprocessor took 35.92 ms. Allocated memory is still 151.0 MB. Free memory was 117.5 MB in the beginning and 116.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-23 19:00:05,271 INFO L168 Benchmark]: RCFGBuilder took 380.97 ms. Allocated memory is still 151.0 MB. Free memory was 116.0 MB in the beginning and 133.4 MB in the end (delta: -17.3 MB). Peak memory consumption was 15.6 MB. Max. memory is 8.0 GB. [2021-02-23 19:00:05,272 INFO L168 Benchmark]: TraceAbstraction took 3473.08 ms. Allocated memory is still 151.0 MB. Free memory was 133.0 MB in the beginning and 113.5 MB in the end (delta: 19.4 MB). Peak memory consumption was 19.8 MB. Max. memory is 8.0 GB. [2021-02-23 19:00:05,276 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 151.0 MB. Free memory is still 124.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 275.49 ms. Allocated memory is still 151.0 MB. Free memory was 127.1 MB in the beginning and 117.5 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 35.92 ms. Allocated memory is still 151.0 MB. Free memory was 117.5 MB in the beginning and 116.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 380.97 ms. Allocated memory is still 151.0 MB. Free memory was 116.0 MB in the beginning and 133.4 MB in the end (delta: -17.3 MB). Peak memory consumption was 15.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3473.08 ms. Allocated memory is still 151.0 MB. Free memory was 133.0 MB in the beginning and 113.5 MB in the end (delta: 19.4 MB). Peak memory consumption was 19.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 19]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L25] int i; [L26] i = 0 [L26] COND TRUE i != 1000000 [L27] CALL __VERIFIER_assert(i <= 1000000) [L18] COND FALSE !(!(cond)) [L27] RET __VERIFIER_assert(i <= 1000000) [L26] i++ [L26] COND TRUE i != 1000000 [L27] CALL __VERIFIER_assert(i <= 1000000) [L18] COND TRUE !(cond) [L19] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.3s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 23 SDtfs, 31 SDslu, 45 SDs, 0 SdLazy, 56 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 2 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 proved your program to be incorrect! Received shutdown request...