/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/array-tiling/skippedu.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 01:55:52,651 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 01:55:52,656 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 01:55:52,720 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-07 01:55:52,752 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 01:55:52,756 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 01:55:52,758 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 01:55:52,760 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 01:55:52,761 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 01:55:52,765 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 01:55:52,781 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 01:55:52,787 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 01:55:52,792 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 01:55:52,793 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 01:55:52,795 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 01:55:52,796 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 01:55:52,799 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 01:55:52,803 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-07 01:55:52,804 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-07 01:55:52,804 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-07 01:55:52,805 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-07 01:55:52,807 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-07 01:55:52,807 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-07 01:55:52,808 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-07 01:55:52,808 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-07 01:55:52,808 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 01:55:52,809 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 01:55:52,810 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 01:55:52,812 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 01:55:52,826 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 01:55:52,826 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 01:55:52,828 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 01:55:52,828 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 01:55:52,828 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 01:55:52,829 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 01:55:52,829 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 01:55:52,829 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 01:55:52,829 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 01:55:52,829 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 01:55:52,830 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 01:55:52,830 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 01:55:52,830 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 01:55:52,830 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 01:55:52,831 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 01:55:52,831 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 01:55:52,831 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 01:55:52,831 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 01:55:52,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 01:55:52,832 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 01:55:52,832 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 01:55:52,832 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 01:55:52,832 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 01:55:53,240 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 01:55:53,276 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 01:55:53,279 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 01:55:53,281 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 01:55:53,282 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 01:55:53,283 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/skippedu.c [2020-11-07 01:55:53,375 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/828acb5f4/46519a1d3fd948059c3601da4095bce9/FLAG89ef4cbc5 [2020-11-07 01:55:53,976 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 01:55:53,977 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/skippedu.c [2020-11-07 01:55:53,984 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/828acb5f4/46519a1d3fd948059c3601da4095bce9/FLAG89ef4cbc5 [2020-11-07 01:55:54,337 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/828acb5f4/46519a1d3fd948059c3601da4095bce9 [2020-11-07 01:55:54,346 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 01:55:54,356 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 01:55:54,359 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 01:55:54,359 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 01:55:54,364 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 01:55:54,365 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:55:54" (1/1) ... [2020-11-07 01:55:54,372 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dbeefb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:54, skipping insertion in model container [2020-11-07 01:55:54,372 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:55:54" (1/1) ... [2020-11-07 01:55:54,382 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 01:55:54,403 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 01:55:54,594 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 01:55:54,605 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 01:55:54,630 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 01:55:54,648 INFO L208 MainTranslator]: Completed translation [2020-11-07 01:55:54,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:54 WrapperNode [2020-11-07 01:55:54,649 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 01:55:54,650 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 01:55:54,651 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 01:55:54,651 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 01:55:54,666 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:54" (1/1) ... [2020-11-07 01:55:54,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:54" (1/1) ... [2020-11-07 01:55:54,675 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:54" (1/1) ... [2020-11-07 01:55:54,676 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:54" (1/1) ... [2020-11-07 01:55:54,685 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:54" (1/1) ... [2020-11-07 01:55:54,691 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:54" (1/1) ... [2020-11-07 01:55:54,694 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:54" (1/1) ... [2020-11-07 01:55:54,697 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 01:55:54,698 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 01:55:54,698 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 01:55:54,698 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 01:55:54,699 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:54" (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 01:55:54,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 01:55:54,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 01:55:54,794 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 01:55:54,795 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-07 01:55:54,795 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 01:55:54,795 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 01:55:54,795 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 01:55:54,796 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 01:55:54,796 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 01:55:54,796 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 01:55:54,797 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-07 01:55:54,797 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 01:55:54,797 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 01:55:54,798 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-11-07 01:55:54,798 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 01:55:54,798 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-07 01:55:54,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 01:55:54,799 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 01:55:54,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 01:55:54,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 01:55:54,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 01:55:54,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 01:55:55,515 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 01:55:55,516 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-11-07 01:55:55,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:55:55 BoogieIcfgContainer [2020-11-07 01:55:55,518 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 01:55:55,520 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 01:55:55,520 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 01:55:55,524 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 01:55:55,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:55:54" (1/3) ... [2020-11-07 01:55:55,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ac89457 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:55:55, skipping insertion in model container [2020-11-07 01:55:55,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:54" (2/3) ... [2020-11-07 01:55:55,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ac89457 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:55:55, skipping insertion in model container [2020-11-07 01:55:55,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:55:55" (3/3) ... [2020-11-07 01:55:55,528 INFO L111 eAbstractionObserver]: Analyzing ICFG skippedu.c [2020-11-07 01:55:55,546 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 01:55:55,551 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 01:55:55,565 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 01:55:55,592 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 01:55:55,592 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 01:55:55,592 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 01:55:55,593 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 01:55:55,593 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 01:55:55,593 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 01:55:55,593 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 01:55:55,593 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 01:55:55,612 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states. [2020-11-07 01:55:55,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-07 01:55:55,624 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:55:55,624 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] [2020-11-07 01:55:55,625 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:55:55,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:55:55,632 INFO L82 PathProgramCache]: Analyzing trace with hash 197142043, now seen corresponding path program 1 times [2020-11-07 01:55:55,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:55:55,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [836866692] [2020-11-07 01:55:55,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:55:55,731 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:55:55,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:55:56,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:55:56,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:55:56,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-11-07 01:55:56,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:55:56,086 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 01:55:56,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [836866692] [2020-11-07 01:55:56,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:55:56,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-07 01:55:56,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142887666] [2020-11-07 01:55:56,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-07 01:55:56,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:55:56,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-07 01:55:56,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 01:55:56,118 INFO L87 Difference]: Start difference. First operand 75 states. Second operand 3 states. [2020-11-07 01:55:56,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:55:56,476 INFO L93 Difference]: Finished difference Result 118 states and 140 transitions. [2020-11-07 01:55:56,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-07 01:55:56,479 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2020-11-07 01:55:56,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:55:56,489 INFO L225 Difference]: With dead ends: 118 [2020-11-07 01:55:56,489 INFO L226 Difference]: Without dead ends: 65 [2020-11-07 01:55:56,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 01:55:56,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-11-07 01:55:56,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-11-07 01:55:56,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-07 01:55:56,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2020-11-07 01:55:56,553 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 39 [2020-11-07 01:55:56,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:55:56,553 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2020-11-07 01:55:56,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-07 01:55:56,554 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2020-11-07 01:55:56,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-07 01:55:56,556 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:55:56,556 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] [2020-11-07 01:55:56,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 01:55:56,557 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:55:56,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:55:56,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1804362736, now seen corresponding path program 1 times [2020-11-07 01:55:56,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:55:56,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1777697704] [2020-11-07 01:55:56,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:55:56,563 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:55:56,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:55:56,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:55:56,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:55:56,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-11-07 01:55:56,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:55:56,803 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 01:55:56,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1777697704] [2020-11-07 01:55:56,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:55:56,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 01:55:56,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987258759] [2020-11-07 01:55:56,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 01:55:56,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:55:56,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 01:55:56,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-07 01:55:56,812 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand 5 states. [2020-11-07 01:55:57,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:55:57,207 INFO L93 Difference]: Finished difference Result 113 states and 122 transitions. [2020-11-07 01:55:57,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-07 01:55:57,208 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2020-11-07 01:55:57,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:55:57,212 INFO L225 Difference]: With dead ends: 113 [2020-11-07 01:55:57,212 INFO L226 Difference]: Without dead ends: 77 [2020-11-07 01:55:57,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-07 01:55:57,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-11-07 01:55:57,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 66. [2020-11-07 01:55:57,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-11-07 01:55:57,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2020-11-07 01:55:57,233 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 39 [2020-11-07 01:55:57,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:55:57,234 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2020-11-07 01:55:57,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-07 01:55:57,234 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2020-11-07 01:55:57,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-07 01:55:57,236 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:55:57,236 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] [2020-11-07 01:55:57,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 01:55:57,237 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:55:57,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:55:57,237 INFO L82 PathProgramCache]: Analyzing trace with hash -950812081, now seen corresponding path program 1 times [2020-11-07 01:55:57,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:55:57,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1918327147] [2020-11-07 01:55:57,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:55:57,315 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:55:57,317 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:55:57,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:55:57,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:55:57,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:55:57,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-11-07 01:55:57,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:55:57,488 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 01:55:57,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1918327147] [2020-11-07 01:55:57,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:55:57,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-07 01:55:57,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359682023] [2020-11-07 01:55:57,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-07 01:55:57,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:55:57,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-07 01:55:57,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-11-07 01:55:57,492 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 7 states. [2020-11-07 01:55:57,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:55:57,988 INFO L93 Difference]: Finished difference Result 117 states and 127 transitions. [2020-11-07 01:55:57,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-07 01:55:57,989 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 46 [2020-11-07 01:55:57,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:55:57,995 INFO L225 Difference]: With dead ends: 117 [2020-11-07 01:55:57,995 INFO L226 Difference]: Without dead ends: 81 [2020-11-07 01:55:57,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-11-07 01:55:57,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-11-07 01:55:58,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 73. [2020-11-07 01:55:58,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-11-07 01:55:58,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2020-11-07 01:55:58,027 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 46 [2020-11-07 01:55:58,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:55:58,028 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2020-11-07 01:55:58,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-07 01:55:58,029 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2020-11-07 01:55:58,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-07 01:55:58,033 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:55:58,034 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:55:58,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 01:55:58,034 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:55:58,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:55:58,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1786321104, now seen corresponding path program 2 times [2020-11-07 01:55:58,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:55:58,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1195433717] [2020-11-07 01:55:58,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:55:58,127 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:55:58,129 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:55:58,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:55:58,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:55:58,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:55:58,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-11-07 01:55:58,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:55:58,447 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 01:55:58,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1195433717] [2020-11-07 01:55:58,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:55:58,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 01:55:58,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651014850] [2020-11-07 01:55:58,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 01:55:58,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:55:58,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 01:55:58,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-07 01:55:58,450 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 6 states. [2020-11-07 01:55:58,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:55:58,729 INFO L93 Difference]: Finished difference Result 101 states and 108 transitions. [2020-11-07 01:55:58,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 01:55:58,730 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2020-11-07 01:55:58,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:55:58,732 INFO L225 Difference]: With dead ends: 101 [2020-11-07 01:55:58,732 INFO L226 Difference]: Without dead ends: 86 [2020-11-07 01:55:58,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-07 01:55:58,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-11-07 01:55:58,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 74. [2020-11-07 01:55:58,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-11-07 01:55:58,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2020-11-07 01:55:58,748 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 53 [2020-11-07 01:55:58,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:55:58,749 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2020-11-07 01:55:58,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 01:55:58,749 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2020-11-07 01:55:58,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-07 01:55:58,750 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:55:58,750 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 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] [2020-11-07 01:55:58,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 01:55:58,751 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:55:58,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:55:58,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1380545564, now seen corresponding path program 1 times [2020-11-07 01:55:58,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:55:58,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1373213611] [2020-11-07 01:55:58,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:55:58,825 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:55:58,827 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:55:58,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 01:55:58,858 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 01:55:58,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 01:55:58,886 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 01:55:58,920 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 01:55:58,920 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 01:55:58,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 01:55:58,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 01:55:58 BoogieIcfgContainer [2020-11-07 01:55:58,941 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 01:55:58,943 INFO L168 Benchmark]: Toolchain (without parser) took 4591.25 ms. Allocated memory was 154.1 MB in the beginning and 185.6 MB in the end (delta: 31.5 MB). Free memory was 131.0 MB in the beginning and 143.4 MB in the end (delta: -12.4 MB). Peak memory consumption was 20.0 MB. Max. memory is 8.0 GB. [2020-11-07 01:55:58,944 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 154.1 MB. Free memory was 128.4 MB in the beginning and 128.4 MB in the end (delta: 82.0 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 01:55:58,945 INFO L168 Benchmark]: CACSL2BoogieTranslator took 290.27 ms. Allocated memory is still 154.1 MB. Free memory was 130.2 MB in the beginning and 120.4 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-07 01:55:58,946 INFO L168 Benchmark]: Boogie Preprocessor took 46.52 ms. Allocated memory is still 154.1 MB. Free memory was 120.4 MB in the beginning and 118.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-07 01:55:58,947 INFO L168 Benchmark]: RCFGBuilder took 820.59 ms. Allocated memory is still 154.1 MB. Free memory was 118.7 MB in the beginning and 130.3 MB in the end (delta: -11.6 MB). Peak memory consumption was 15.2 MB. Max. memory is 8.0 GB. [2020-11-07 01:55:58,948 INFO L168 Benchmark]: TraceAbstraction took 3420.48 ms. Allocated memory was 154.1 MB in the beginning and 185.6 MB in the end (delta: 31.5 MB). Free memory was 130.3 MB in the beginning and 143.4 MB in the end (delta: -13.1 MB). Peak memory consumption was 19.4 MB. Max. memory is 8.0 GB. [2020-11-07 01:55:58,952 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 154.1 MB. Free memory was 128.4 MB in the beginning and 128.4 MB in the end (delta: 82.0 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 290.27 ms. Allocated memory is still 154.1 MB. Free memory was 130.2 MB in the beginning and 120.4 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 46.52 ms. Allocated memory is still 154.1 MB. Free memory was 120.4 MB in the beginning and 118.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 820.59 ms. Allocated memory is still 154.1 MB. Free memory was 118.7 MB in the beginning and 130.3 MB in the end (delta: -11.6 MB). Peak memory consumption was 15.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3420.48 ms. Allocated memory was 154.1 MB in the beginning and 185.6 MB in the end (delta: 31.5 MB). Free memory was 130.3 MB in the beginning and 143.4 MB in the end (delta: -13.1 MB). Peak memory consumption was 19.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int SIZE; [L14] const int MAX = 100000; [L18] SIZE = __VERIFIER_nondet_int() [L19] COND TRUE SIZE > 1 && SIZE < MAX [L21] int i; [L22] int *a = malloc(sizeof(int)*SIZE); [L24] i = 0 [L24] COND TRUE i < SIZE [L26] a[i] = __VERIFIER_nondet_int() [L24] i++ [L24] COND TRUE i < SIZE [L26] a[i] = __VERIFIER_nondet_int() [L24] i++ [L24] COND FALSE !(i < SIZE) [L29] COND FALSE !(SIZE % 2 != 0) [L31] CALL assume_abort_if_not(SIZE % 2 == 0) [L6] COND FALSE !(!cond) [L31] RET assume_abort_if_not(SIZE % 2 == 0) [L32] i = 1 [L32] COND TRUE i <= SIZE/2 [L34] EXPR a[2*i-2] [L34] COND FALSE !(a[2*i-2] > i) [L38] EXPR a[2*i-1] [L38] COND FALSE !(a[2*i-1] > i) [L32] i++ [L32] COND FALSE !(i <= SIZE/2) [L44] i = 0 [L44] COND TRUE i < SIZE [L46] EXPR a[i] [L46] CALL __VERIFIER_assert( a[i] <= i ) [L8] COND TRUE !(cond) [L8] CALL reach_error() [L3] __assert_fail("0", "skippedu.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 75 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.3s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 231 SDtfs, 306 SDslu, 128 SDs, 0 SdLazy, 455 SolverSat, 43 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=75occurred 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: 0.1s AutomataMinimizationTime, 4 MinimizatonAttempts, 31 StatesRemovedByMinimization, 3 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...