/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 0.2.0-7d8eed3 [2020-11-07 02:09:32,937 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 02:09:32,940 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 02:09:32,985 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-07 02:09:33,081 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 02:09:33,082 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 02:09:33,083 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 02:09:33,084 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 02:09:33,109 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 02:09:33,109 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 02:09:33,114 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 02:09:33,115 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 02:09:33,115 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 02:09:33,115 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 02:09:33,115 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 02:09:33,116 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 02:09:33,116 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 02:09:33,116 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 02:09:33,117 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 02:09:33,118 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 02:09:33,118 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 02:09:33,118 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 02:09:33,118 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 02:09:33,119 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 02:09:33,119 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 02:09:33,119 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 02:09:33,119 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 02:09:33,119 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 02:09:33,120 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 02:09:33,120 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 02:09:33,120 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 02:09:33,551 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 02:09:33,595 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 02:09:33,598 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 02:09:33,599 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 02:09:33,600 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 02:09:33,601 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/count_by_1_variant.i [2020-11-07 02:09:33,682 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4bf27282/197fcb46378343298edc851ad2bfddd7/FLAG5a9152fb4 [2020-11-07 02:09:34,475 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 02:09:34,476 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_1_variant.i [2020-11-07 02:09:34,485 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4bf27282/197fcb46378343298edc851ad2bfddd7/FLAG5a9152fb4 [2020-11-07 02:09:34,819 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4bf27282/197fcb46378343298edc851ad2bfddd7 [2020-11-07 02:09:34,822 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 02:09:34,829 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 02:09:34,832 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 02:09:34,833 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 02:09:34,837 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 02:09:34,838 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:09:34" (1/1) ... [2020-11-07 02:09:34,842 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@598949f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:34, skipping insertion in model container [2020-11-07 02:09:34,842 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:09:34" (1/1) ... [2020-11-07 02:09:34,852 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 02:09:34,870 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 02:09:35,043 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 02:09:35,054 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 02:09:35,073 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 02:09:35,092 INFO L208 MainTranslator]: Completed translation [2020-11-07 02:09:35,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:35 WrapperNode [2020-11-07 02:09:35,092 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 02:09:35,094 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 02:09:35,094 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 02:09:35,094 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 02:09:35,110 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:35" (1/1) ... [2020-11-07 02:09:35,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:35" (1/1) ... [2020-11-07 02:09:35,119 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:35" (1/1) ... [2020-11-07 02:09:35,120 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:35" (1/1) ... [2020-11-07 02:09:35,126 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:35" (1/1) ... [2020-11-07 02:09:35,131 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:35" (1/1) ... [2020-11-07 02:09:35,133 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:35" (1/1) ... [2020-11-07 02:09:35,135 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 02:09:35,136 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 02:09:35,137 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 02:09:35,137 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 02:09:35,138 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:35" (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 [2020-11-07 02:09:35,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 02:09:35,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 02:09:35,230 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 02:09:35,231 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-07 02:09:35,231 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 02:09:35,232 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 02:09:35,232 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 02:09:35,232 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 02:09:35,232 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-11-07 02:09:35,232 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-11-07 02:09:35,233 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 02:09:35,234 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 02:09:35,234 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-07 02:09:35,234 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 02:09:35,235 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 02:09:35,235 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 02:09:35,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 02:09:35,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 02:09:35,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 02:09:35,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 02:09:35,238 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 02:09:35,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 02:09:35,625 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 02:09:35,625 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-07 02:09:35,628 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:09:35 BoogieIcfgContainer [2020-11-07 02:09:35,628 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 02:09:35,631 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 02:09:35,631 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 02:09:35,636 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 02:09:35,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:09:34" (1/3) ... [2020-11-07 02:09:35,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@794ad063 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:09:35, skipping insertion in model container [2020-11-07 02:09:35,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:35" (2/3) ... [2020-11-07 02:09:35,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@794ad063 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:09:35, skipping insertion in model container [2020-11-07 02:09:35,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:09:35" (3/3) ... [2020-11-07 02:09:35,640 INFO L111 eAbstractionObserver]: Analyzing ICFG count_by_1_variant.i [2020-11-07 02:09:35,663 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 02:09:35,667 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 02:09:35,684 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 02:09:35,714 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 02:09:35,714 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 02:09:35,714 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 02:09:35,715 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 02:09:35,715 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 02:09:35,715 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 02:09:35,715 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 02:09:35,715 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 02:09:35,736 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-11-07 02:09:35,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-07 02:09:35,749 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:09:35,751 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] [2020-11-07 02:09:35,751 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:09:35,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:09:35,771 INFO L82 PathProgramCache]: Analyzing trace with hash -774165412, now seen corresponding path program 1 times [2020-11-07 02:09:35,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:09:35,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1536023430] [2020-11-07 02:09:35,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:09:35,894 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:09:36,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:09:36,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:09:36,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:09:36,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:09:36,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1536023430] [2020-11-07 02:09:36,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:09:36,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 02:09:36,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3905741] [2020-11-07 02:09:36,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 02:09:36,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:09:36,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 02:09:36,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-07 02:09:36,347 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 6 states. [2020-11-07 02:09:37,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:09:37,000 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2020-11-07 02:09:37,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 02:09:37,003 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-11-07 02:09:37,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:09:37,012 INFO L225 Difference]: With dead ends: 61 [2020-11-07 02:09:37,013 INFO L226 Difference]: Without dead ends: 34 [2020-11-07 02:09:37,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-11-07 02:09:37,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-11-07 02:09:37,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-11-07 02:09:37,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-11-07 02:09:37,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-11-07 02:09:37,112 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 20 [2020-11-07 02:09:37,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:09:37,112 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-11-07 02:09:37,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 02:09:37,113 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-11-07 02:09:37,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-07 02:09:37,114 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:09:37,114 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, 1, 1] [2020-11-07 02:09:37,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 02:09:37,115 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:09:37,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:09:37,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1660354641, now seen corresponding path program 1 times [2020-11-07 02:09:37,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:09:37,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [224137178] [2020-11-07 02:09:37,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:09:37,283 WARN L194 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 15 [2020-11-07 02:09:39,542 WARN L194 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2020-11-07 02:09:39,599 INFO L316 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-11-07 02:09:39,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 02:09:39,650 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 02:09:39,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 02:09:39,697 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 02:09:39,747 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 02:09:39,748 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 02:09:39,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 02:09:39,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 02:09:39 BoogieIcfgContainer [2020-11-07 02:09:39,775 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 02:09:39,782 INFO L168 Benchmark]: Toolchain (without parser) took 4952.20 ms. Allocated memory is still 151.0 MB. Free memory was 127.4 MB in the beginning and 107.7 MB in the end (delta: 19.7 MB). Peak memory consumption was 21.1 MB. Max. memory is 8.0 GB. [2020-11-07 02:09:39,782 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 151.0 MB. Free memory is still 125.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 02:09:39,788 INFO L168 Benchmark]: CACSL2BoogieTranslator took 260.49 ms. Allocated memory is still 151.0 MB. Free memory was 126.9 MB in the beginning and 117.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-07 02:09:39,790 INFO L168 Benchmark]: Boogie Preprocessor took 41.62 ms. Allocated memory is still 151.0 MB. Free memory was 117.1 MB in the beginning and 115.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-07 02:09:39,791 INFO L168 Benchmark]: RCFGBuilder took 492.19 ms. Allocated memory is still 151.0 MB. Free memory was 115.7 MB in the beginning and 133.6 MB in the end (delta: -18.0 MB). Peak memory consumption was 17.2 MB. Max. memory is 8.0 GB. [2020-11-07 02:09:39,793 INFO L168 Benchmark]: TraceAbstraction took 4144.45 ms. Allocated memory is still 151.0 MB. Free memory was 133.6 MB in the beginning and 107.7 MB in the end (delta: 25.9 MB). Peak memory consumption was 25.9 MB. Max. memory is 8.0 GB. [2020-11-07 02:09:39,806 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 151.0 MB. Free memory is still 125.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 260.49 ms. Allocated memory is still 151.0 MB. Free memory was 126.9 MB in the beginning and 117.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 41.62 ms. Allocated memory is still 151.0 MB. Free memory was 117.1 MB in the beginning and 115.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 492.19 ms. Allocated memory is still 151.0 MB. Free memory was 115.7 MB in the beginning and 133.6 MB in the end (delta: -18.0 MB). Peak memory consumption was 17.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4144.45 ms. Allocated memory is still 151.0 MB. Free memory was 133.6 MB in the beginning and 107.7 MB in the end (delta: 25.9 MB). Peak memory consumption was 25.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_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] CALL reach_error() [L12] COND FALSE !(0) [L12] __assert_fail ("0", "assert.h", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.0s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 25 SDtfs, 32 SDslu, 48 SDs, 0 SdLazy, 59 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred 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...