/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-tiling/skippedu.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:43:50,687 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:43:50,690 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:43:50,725 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 22:43:50,726 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 22:43:50,727 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 22:43:50,729 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 22:43:50,731 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 22:43:50,733 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 22:43:50,735 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 22:43:50,736 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 22:43:50,737 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 22:43:50,738 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 22:43:50,739 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 22:43:50,740 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 22:43:50,742 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 22:43:50,743 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 22:43:50,744 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 22:43:50,754 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 22:43:50,756 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 22:43:50,758 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 22:43:50,759 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 22:43:50,761 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 22:43:50,761 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 22:43:50,765 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-06 22:43:50,774 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:43:50,775 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:43:50,776 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:43:50,781 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-06 22:43:50,832 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:43:50,833 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:43:50,838 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:43:50,838 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:43:50,838 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:43:50,838 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:43:50,839 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:43:50,839 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:43:50,841 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:43:50,841 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:43:50,841 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:43:50,842 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:43:50,842 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:43:50,842 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:43:50,842 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:43:50,842 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:43:50,843 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:43:50,843 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:43:50,843 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:43:50,843 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:43:50,843 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:43:50,843 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:43:50,844 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:43:50,845 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:43:50,845 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:43:50,846 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:43:50,846 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:43:50,846 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:43:50,846 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:43:50,846 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:43:51,270 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:43:51,302 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:43:51,307 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:43:51,309 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:43:51,310 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:43:51,311 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/skippedu.c [2020-11-06 22:43:51,406 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3e8a1320/9299cd98ebce41cda201689b70b56f6b/FLAGa8a945394 [2020-11-06 22:43:52,085 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:43:52,087 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/skippedu.c [2020-11-06 22:43:52,095 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3e8a1320/9299cd98ebce41cda201689b70b56f6b/FLAGa8a945394 [2020-11-06 22:43:52,422 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3e8a1320/9299cd98ebce41cda201689b70b56f6b [2020-11-06 22:43:52,436 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:43:52,446 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:43:52,448 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:43:52,449 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:43:52,454 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:43:52,455 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:43:52" (1/1) ... [2020-11-06 22:43:52,460 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55176a4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:52, skipping insertion in model container [2020-11-06 22:43:52,460 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:43:52" (1/1) ... [2020-11-06 22:43:52,469 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:43:52,494 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:43:52,681 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:43:52,692 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:43:52,716 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:43:52,735 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:43:52,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:52 WrapperNode [2020-11-06 22:43:52,736 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:43:52,737 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:43:52,737 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:43:52,737 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:43:52,751 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:52" (1/1) ... [2020-11-06 22:43:52,752 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:52" (1/1) ... [2020-11-06 22:43:52,761 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:52" (1/1) ... [2020-11-06 22:43:52,761 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:52" (1/1) ... [2020-11-06 22:43:52,770 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:52" (1/1) ... [2020-11-06 22:43:52,776 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:52" (1/1) ... [2020-11-06 22:43:52,778 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:52" (1/1) ... [2020-11-06 22:43:52,781 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:43:52,783 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:43:52,783 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:43:52,783 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:43:52,784 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:52" (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 [2020-11-06 22:43:52,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:43:52,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:43:52,867 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:43:52,867 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-06 22:43:52,867 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-06 22:43:52,868 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:43:52,868 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:43:52,868 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:43:52,868 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:43:52,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:43:52,869 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-06 22:43:52,869 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-06 22:43:52,869 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-06 22:43:52,869 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-11-06 22:43:52,869 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:43:52,869 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-06 22:43:52,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:43:52,870 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:43:52,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:43:52,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:43:52,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:43:52,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:43:53,364 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:43:53,364 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-11-06 22:43:53,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:43:53 BoogieIcfgContainer [2020-11-06 22:43:53,366 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:43:53,368 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:43:53,368 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:43:53,372 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:43:53,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:43:52" (1/3) ... [2020-11-06 22:43:53,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62ac10b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:43:53, skipping insertion in model container [2020-11-06 22:43:53,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:52" (2/3) ... [2020-11-06 22:43:53,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62ac10b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:43:53, skipping insertion in model container [2020-11-06 22:43:53,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:43:53" (3/3) ... [2020-11-06 22:43:53,378 INFO L111 eAbstractionObserver]: Analyzing ICFG skippedu.c [2020-11-06 22:43:53,396 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:43:53,402 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:43:53,416 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:43:53,460 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:43:53,460 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:43:53,461 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:43:53,461 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:43:53,461 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:43:53,461 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:43:53,461 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:43:53,461 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:43:53,485 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-11-06 22:43:53,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-06 22:43:53,494 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:43:53,495 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] [2020-11-06 22:43:53,495 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:43:53,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:43:53,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1434902792, now seen corresponding path program 1 times [2020-11-06 22:43:53,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:43:53,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657704805] [2020-11-06 22:43:53,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:43:53,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:53,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:43:53,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:54,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-06 22:43:54,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:54,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:43:54,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657704805] [2020-11-06 22:43:54,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:43:54,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:43:54,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359253159] [2020-11-06 22:43:54,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:43:54,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:43:54,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:43:54,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:43:54,048 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 4 states. [2020-11-06 22:43:54,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:43:54,215 INFO L93 Difference]: Finished difference Result 72 states and 96 transitions. [2020-11-06 22:43:54,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:43:54,218 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-11-06 22:43:54,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:43:54,227 INFO L225 Difference]: With dead ends: 72 [2020-11-06 22:43:54,227 INFO L226 Difference]: Without dead ends: 35 [2020-11-06 22:43:54,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:43:54,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-06 22:43:54,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-11-06 22:43:54,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-06 22:43:54,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-11-06 22:43:54,277 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 23 [2020-11-06 22:43:54,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:43:54,278 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-11-06 22:43:54,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:43:54,278 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-11-06 22:43:54,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-06 22:43:54,279 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:43:54,279 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] [2020-11-06 22:43:54,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:43:54,280 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:43:54,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:43:54,280 INFO L82 PathProgramCache]: Analyzing trace with hash -714921848, now seen corresponding path program 1 times [2020-11-06 22:43:54,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:43:54,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751536246] [2020-11-06 22:43:54,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:43:54,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:54,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:43:54,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:54,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-11-06 22:43:54,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:54,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:43:54,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751536246] [2020-11-06 22:43:54,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866534630] [2020-11-06 22:43:54,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:43:54,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:54,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-06 22:43:54,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:43:54,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:43:54,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:43:54,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2020-11-06 22:43:54,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441026020] [2020-11-06 22:43:54,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-06 22:43:54,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:43:54,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-06 22:43:54,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-06 22:43:54,634 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 7 states. [2020-11-06 22:43:54,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:43:54,825 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2020-11-06 22:43:54,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 22:43:54,826 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-11-06 22:43:54,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:43:54,827 INFO L225 Difference]: With dead ends: 61 [2020-11-06 22:43:54,828 INFO L226 Difference]: Without dead ends: 37 [2020-11-06 22:43:54,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-06 22:43:54,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-06 22:43:54,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-11-06 22:43:54,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-06 22:43:54,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-11-06 22:43:54,841 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 25 [2020-11-06 22:43:54,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:43:54,842 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-11-06 22:43:54,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-06 22:43:54,842 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-11-06 22:43:54,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-06 22:43:54,843 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:43:54,844 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-11-06 22:43:55,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-06 22:43:55,061 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:43:55,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:43:55,062 INFO L82 PathProgramCache]: Analyzing trace with hash 193985738, now seen corresponding path program 2 times [2020-11-06 22:43:55,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:43:55,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23970482] [2020-11-06 22:43:55,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:43:55,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:55,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:43:55,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:55,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-06 22:43:55,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:55,368 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-06 22:43:55,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23970482] [2020-11-06 22:43:55,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:43:55,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-06 22:43:55,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185865146] [2020-11-06 22:43:55,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:43:55,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:43:55,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:43:55,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:43:55,376 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 6 states. [2020-11-06 22:43:55,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:43:55,575 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2020-11-06 22:43:55,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-06 22:43:55,575 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-11-06 22:43:55,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:43:55,577 INFO L225 Difference]: With dead ends: 53 [2020-11-06 22:43:55,577 INFO L226 Difference]: Without dead ends: 41 [2020-11-06 22:43:55,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-06 22:43:55,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-11-06 22:43:55,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2020-11-06 22:43:55,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-11-06 22:43:55,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-11-06 22:43:55,588 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 27 [2020-11-06 22:43:55,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:43:55,589 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-11-06 22:43:55,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:43:55,589 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-11-06 22:43:55,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-06 22:43:55,590 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:43:55,590 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-11-06 22:43:55,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-06 22:43:55,591 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:43:55,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:43:55,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1607242461, now seen corresponding path program 1 times [2020-11-06 22:43:55,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:43:55,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276862203] [2020-11-06 22:43:55,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:43:55,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:55,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:43:55,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:55,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-06 22:43:55,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:55,888 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-06 22:43:55,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276862203] [2020-11-06 22:43:55,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805236561] [2020-11-06 22:43:55,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:43:55,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:55,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-06 22:43:55,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:43:56,034 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2020-11-06 22:43:56,034 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:43:56,042 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:43:56,042 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-06 22:43:56,043 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:20 [2020-11-06 22:43:56,084 INFO L348 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2020-11-06 22:43:56,085 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2020-11-06 22:43:56,086 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:43:56,092 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:43:56,092 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-06 22:43:56,093 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2020-11-06 22:43:56,162 INFO L348 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2020-11-06 22:43:56,163 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 36 [2020-11-06 22:43:56,167 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:43:56,169 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:43:56,173 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-11-06 22:43:56,190 INFO L625 ElimStorePlain]: treesize reduction 33, result has 17.5 percent of original size [2020-11-06 22:43:56,190 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-06 22:43:56,191 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:31, output treesize:7 [2020-11-06 22:43:56,213 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:43:56,269 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-06 22:43:56,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:43:56,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2020-11-06 22:43:56,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786186677] [2020-11-06 22:43:56,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-06 22:43:56,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:43:56,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-06 22:43:56,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-11-06 22:43:56,273 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 18 states. [2020-11-06 22:43:56,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:43:56,999 INFO L93 Difference]: Finished difference Result 88 states and 106 transitions. [2020-11-06 22:43:56,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-06 22:43:57,000 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 32 [2020-11-06 22:43:57,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:43:57,003 INFO L225 Difference]: With dead ends: 88 [2020-11-06 22:43:57,004 INFO L226 Difference]: Without dead ends: 85 [2020-11-06 22:43:57,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2020-11-06 22:43:57,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-11-06 22:43:57,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 50. [2020-11-06 22:43:57,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-11-06 22:43:57,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2020-11-06 22:43:57,023 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 32 [2020-11-06 22:43:57,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:43:57,024 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2020-11-06 22:43:57,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-06 22:43:57,024 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2020-11-06 22:43:57,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-06 22:43:57,025 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:43:57,025 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-11-06 22:43:57,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:43:57,241 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:43:57,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:43:57,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1349077023, now seen corresponding path program 1 times [2020-11-06 22:43:57,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:43:57,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759162874] [2020-11-06 22:43:57,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:43:57,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:43:57,275 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:43:57,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:43:57,336 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:43:57,378 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-06 22:43:57,381 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-06 22:43:57,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-06 22:43:57,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:43:57 BoogieIcfgContainer [2020-11-06 22:43:57,461 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:43:57,465 INFO L168 Benchmark]: Toolchain (without parser) took 5022.94 ms. Allocated memory was 166.7 MB in the beginning and 200.3 MB in the end (delta: 33.6 MB). Free memory was 141.7 MB in the beginning and 74.1 MB in the end (delta: 67.6 MB). Peak memory consumption was 102.4 MB. Max. memory is 8.0 GB. [2020-11-06 22:43:57,468 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 166.7 MB. Free memory is still 139.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:43:57,469 INFO L168 Benchmark]: CACSL2BoogieTranslator took 287.91 ms. Allocated memory is still 166.7 MB. Free memory was 141.1 MB in the beginning and 130.9 MB in the end (delta: 10.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-06 22:43:57,470 INFO L168 Benchmark]: Boogie Preprocessor took 44.73 ms. Allocated memory is still 166.7 MB. Free memory was 130.9 MB in the beginning and 129.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-06 22:43:57,470 INFO L168 Benchmark]: RCFGBuilder took 583.58 ms. Allocated memory is still 166.7 MB. Free memory was 129.2 MB in the beginning and 147.0 MB in the end (delta: -17.7 MB). Peak memory consumption was 18.8 MB. Max. memory is 8.0 GB. [2020-11-06 22:43:57,472 INFO L168 Benchmark]: TraceAbstraction took 4093.78 ms. Allocated memory was 166.7 MB in the beginning and 200.3 MB in the end (delta: 33.6 MB). Free memory was 146.6 MB in the beginning and 74.1 MB in the end (delta: 72.5 MB). Peak memory consumption was 106.6 MB. Max. memory is 8.0 GB. [2020-11-06 22:43:57,483 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 166.7 MB. Free memory is still 139.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 287.91 ms. Allocated memory is still 166.7 MB. Free memory was 141.1 MB in the beginning and 130.9 MB in the end (delta: 10.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 44.73 ms. Allocated memory is still 166.7 MB. Free memory was 130.9 MB in the beginning and 129.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 583.58 ms. Allocated memory is still 166.7 MB. Free memory was 129.2 MB in the beginning and 147.0 MB in the end (delta: -17.7 MB). Peak memory consumption was 18.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4093.78 ms. Allocated memory was 166.7 MB in the beginning and 200.3 MB in the end (delta: 33.6 MB). Free memory was 146.6 MB in the beginning and 74.1 MB in the end (delta: 72.5 MB). Peak memory consumption was 106.6 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; VAL [\old(MAX)=100005, \old(SIZE)=100003, MAX=100000, SIZE=0] [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 VAL [\old(SIZE)=0, a={-1:0}, i=0, malloc(sizeof(int)*SIZE)={-1:0}, MAX=100000, SIZE=2] [L24] COND TRUE i < SIZE [L26] a[i] = __VERIFIER_nondet_int() [L24] i++ VAL [\old(SIZE)=0, a={-1:0}, i=1, malloc(sizeof(int)*SIZE)={-1:0}, MAX=100000, SIZE=2] [L24] COND TRUE i < SIZE [L26] a[i] = __VERIFIER_nondet_int() [L24] i++ VAL [\old(SIZE)=0, a={-1:0}, i=2, malloc(sizeof(int)*SIZE)={-1:0}, MAX=100000, SIZE=2] [L24] COND FALSE !(i < SIZE) VAL [\old(SIZE)=0, a={-1:0}, i=2, malloc(sizeof(int)*SIZE)={-1:0}, MAX=100000, SIZE=2] [L29] COND FALSE !(SIZE % 2 != 0) VAL [\old(SIZE)=0, a={-1:0}, i=2, malloc(sizeof(int)*SIZE)={-1:0}, MAX=100000, SIZE=2] [L31] CALL assume_abort_if_not(SIZE % 2 == 0) VAL [\old(cond)=1, \old(SIZE)=0, MAX=100000, SIZE=2] [L6] COND FALSE !(!cond) VAL [\old(cond)=1, \old(SIZE)=0, cond=1, MAX=100000, SIZE=2] [L31] RET assume_abort_if_not(SIZE % 2 == 0) VAL [\old(SIZE)=0, a={-1:0}, i=2, malloc(sizeof(int)*SIZE)={-1:0}, MAX=100000, SIZE=2] [L32] i = 1 VAL [\old(SIZE)=0, a={-1:0}, i=1, malloc(sizeof(int)*SIZE)={-1:0}, MAX=100000, SIZE=2] [L32] COND TRUE i <= SIZE/2 [L34] EXPR a[2*i-2] VAL [\old(SIZE)=0, a={-1:0}, a[2*i-2]=1, i=1, malloc(sizeof(int)*SIZE)={-1:0}, MAX=100000, SIZE=2] [L34] COND FALSE !(a[2*i-2] > i) [L38] EXPR a[2*i-1] VAL [\old(SIZE)=0, a={-1:0}, a[2*i-1]=7, i=1, malloc(sizeof(int)*SIZE)={-1:0}, MAX=100000, SIZE=2] [L38] COND TRUE a[2*i-1] > i [L40] a[2*i-1] = 2*i-1 VAL [\old(SIZE)=0, a={-1:0}, i=1, malloc(sizeof(int)*SIZE)={-1:0}, MAX=100000, SIZE=2] [L32] i++ VAL [\old(SIZE)=0, a={-1:0}, i=2, malloc(sizeof(int)*SIZE)={-1:0}, MAX=100000, SIZE=2] [L32] COND FALSE !(i <= SIZE/2) VAL [\old(SIZE)=0, a={-1:0}, i=2, malloc(sizeof(int)*SIZE)={-1:0}, MAX=100000, SIZE=2] [L44] i = 0 VAL [\old(SIZE)=0, a={-1:0}, i=0, malloc(sizeof(int)*SIZE)={-1:0}, MAX=100000, SIZE=2] [L44] COND TRUE i < SIZE [L46] EXPR a[i] VAL [\old(SIZE)=0, a={-1:0}, a[i]=1, i=0, malloc(sizeof(int)*SIZE)={-1:0}, MAX=100000, SIZE=2] [L46] CALL __VERIFIER_assert( a[i] <= i ) VAL [\old(cond)=0, \old(SIZE)=0, MAX=100000, SIZE=2] [L8] COND TRUE !(cond) VAL [\old(cond)=0, \old(SIZE)=0, cond=0, MAX=100000, SIZE=2] [L8] CALL reach_error() VAL [\old(SIZE)=0, MAX=100000, SIZE=2] [L3] __assert_fail("0", "skippedu.c", 3, "reach_error") VAL [\old(SIZE)=0, MAX=100000, SIZE=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.9s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 130 SDtfs, 200 SDslu, 197 SDs, 0 SdLazy, 605 SolverSat, 81 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 104 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=4, 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, 4 MinimizatonAttempts, 41 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 196 NumberOfCodeBlocks, 196 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 158 ConstructedInterpolants, 0 QuantifiedInterpolants, 18306 SizeOfPredicates, 8 NumberOfNonLiveVariables, 319 ConjunctsInSsa, 14 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 12/16 InterpolantCoveringCapability, 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...