/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-b8ad66e [2020-10-23 18:41:36,510 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:41:36,513 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:41:36,552 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:41:36,553 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:41:36,554 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:41:36,556 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:41:36,559 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:41:36,561 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:41:36,563 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:41:36,564 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:41:36,566 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:41:36,568 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:41:36,570 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:41:36,573 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:41:36,578 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:41:36,579 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:41:36,580 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:41:36,582 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:41:36,601 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:41:36,603 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:41:36,605 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:41:36,607 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:41:36,608 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:41:36,612 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 18:41:36,624 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:41:36,625 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:41:36,626 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:41:36,630 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 [2020-10-23 18:41:36,660 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:41:36,661 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:41:36,662 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:41:36,663 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:41:36,663 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:41:36,663 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:41:36,664 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:41:36,664 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:41:36,664 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:41:36,664 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:41:36,665 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:41:36,665 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:41:36,665 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:41:36,666 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:41:36,666 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:41:36,666 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:41:36,666 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:41:36,667 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:41:36,667 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:41:36,667 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:41:36,668 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:41:36,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:41:36,668 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:41:36,669 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:41:36,669 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:41:36,669 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:41:36,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:41:36,670 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:41:36,670 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:41:36,670 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:41:37,072 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:41:37,109 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:41:37,112 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:41:37,114 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:41:37,115 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:41:37,117 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/skippedu.c [2020-10-23 18:41:37,217 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf9b25b9a/e478165d6a004c24b44a87a715962cf1/FLAG9e73bb2b1 [2020-10-23 18:41:37,846 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:41:37,847 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/skippedu.c [2020-10-23 18:41:37,859 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf9b25b9a/e478165d6a004c24b44a87a715962cf1/FLAG9e73bb2b1 [2020-10-23 18:41:38,235 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf9b25b9a/e478165d6a004c24b44a87a715962cf1 [2020-10-23 18:41:38,238 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:41:38,245 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:41:38,252 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:41:38,252 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:41:38,256 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:41:38,257 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:41:38" (1/1) ... [2020-10-23 18:41:38,262 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5910915d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:38, skipping insertion in model container [2020-10-23 18:41:38,262 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:41:38" (1/1) ... [2020-10-23 18:41:38,270 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:41:38,289 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:41:38,458 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:41:38,470 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:41:38,495 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:41:38,521 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:41:38,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:38 WrapperNode [2020-10-23 18:41:38,522 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:41:38,524 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:41:38,524 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:41:38,525 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:41:38,541 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:38" (1/1) ... [2020-10-23 18:41:38,544 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:38" (1/1) ... [2020-10-23 18:41:38,572 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:38" (1/1) ... [2020-10-23 18:41:38,572 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:38" (1/1) ... [2020-10-23 18:41:38,593 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:38" (1/1) ... [2020-10-23 18:41:38,605 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:38" (1/1) ... [2020-10-23 18:41:38,609 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:38" (1/1) ... [2020-10-23 18:41:38,619 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:41:38,620 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:41:38,620 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:41:38,621 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:41:38,625 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:38" (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 [2020-10-23 18:41:38,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:41:38,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:41:38,740 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:41:38,741 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 18:41:38,741 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 18:41:38,742 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:41:38,743 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:41:38,743 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:41:38,743 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:41:38,744 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:41:38,745 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 18:41:38,745 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 18:41:38,746 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 18:41:38,747 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-23 18:41:38,747 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:41:38,749 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-23 18:41:38,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:41:38,749 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:41:38,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:41:38,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:41:38,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:41:38,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:41:39,483 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:41:39,483 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-23 18:41:39,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:41:39 BoogieIcfgContainer [2020-10-23 18:41:39,489 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:41:39,492 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:41:39,492 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:41:39,496 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:41:39,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:41:38" (1/3) ... [2020-10-23 18:41:39,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17aeffd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:41:39, skipping insertion in model container [2020-10-23 18:41:39,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:38" (2/3) ... [2020-10-23 18:41:39,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17aeffd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:41:39, skipping insertion in model container [2020-10-23 18:41:39,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:41:39" (3/3) ... [2020-10-23 18:41:39,502 INFO L111 eAbstractionObserver]: Analyzing ICFG skippedu.c [2020-10-23 18:41:39,515 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:41:39,521 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:41:39,539 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:41:39,592 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:41:39,592 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:41:39,592 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:41:39,592 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:41:39,592 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:41:39,593 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:41:39,593 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:41:39,593 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:41:39,611 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-10-23 18:41:39,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-23 18:41:39,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:39,619 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] [2020-10-23 18:41:39,619 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:39,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:39,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1434902792, now seen corresponding path program 1 times [2020-10-23 18:41:39,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:39,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10647271] [2020-10-23 18:41:39,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:39,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:39,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:41:39,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:39,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-23 18:41:39,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:39,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:41:39,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10647271] [2020-10-23 18:41:39,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:41:39,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:41:40,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935538355] [2020-10-23 18:41:40,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:41:40,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:41:40,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:41:40,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:41:40,025 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 4 states. [2020-10-23 18:41:40,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:41:40,240 INFO L93 Difference]: Finished difference Result 72 states and 96 transitions. [2020-10-23 18:41:40,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:41:40,242 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-23 18:41:40,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:41:40,251 INFO L225 Difference]: With dead ends: 72 [2020-10-23 18:41:40,251 INFO L226 Difference]: Without dead ends: 35 [2020-10-23 18:41:40,255 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 [2020-10-23 18:41:40,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-23 18:41:40,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-10-23 18:41:40,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-23 18:41:40,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-10-23 18:41:40,301 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 23 [2020-10-23 18:41:40,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:41:40,302 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-10-23 18:41:40,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:41:40,302 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-10-23 18:41:40,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-23 18:41:40,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:40,303 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] [2020-10-23 18:41:40,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:41:40,304 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:40,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:40,305 INFO L82 PathProgramCache]: Analyzing trace with hash -714921848, now seen corresponding path program 1 times [2020-10-23 18:41:40,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:40,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543984178] [2020-10-23 18:41:40,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:40,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:40,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:41:40,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:40,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-23 18:41:40,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:40,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:41:40,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543984178] [2020-10-23 18:41:40,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956733059] [2020-10-23 18:41:40,484 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 [2020-10-23 18:41:40,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:40,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-23 18:41:40,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:41:40,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:41:40,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:41:40,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2020-10-23 18:41:40,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067411088] [2020-10-23 18:41:40,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 18:41:40,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:41:40,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 18:41:40,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:41:40,673 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 7 states. [2020-10-23 18:41:40,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:41:40,871 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2020-10-23 18:41:40,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:41:40,872 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-23 18:41:40,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:41:40,874 INFO L225 Difference]: With dead ends: 61 [2020-10-23 18:41:40,874 INFO L226 Difference]: Without dead ends: 37 [2020-10-23 18:41:40,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:41:40,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-23 18:41:40,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-10-23 18:41:40,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-23 18:41:40,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-10-23 18:41:40,915 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 25 [2020-10-23 18:41:40,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:41:40,915 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-10-23 18:41:40,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 18:41:40,915 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-10-23 18:41:40,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-23 18:41:40,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:40,919 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] [2020-10-23 18:41:41,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-23 18:41:41,134 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:41,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:41,136 INFO L82 PathProgramCache]: Analyzing trace with hash 193985738, now seen corresponding path program 2 times [2020-10-23 18:41:41,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:41,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662585428] [2020-10-23 18:41:41,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:41,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:41,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:41:41,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:41,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 18:41:41,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:41,427 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-23 18:41:41,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662585428] [2020-10-23 18:41:41,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:41:41,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:41:41,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304948027] [2020-10-23 18:41:41,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:41:41,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:41:41,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:41:41,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:41:41,431 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 6 states. [2020-10-23 18:41:41,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:41:41,644 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2020-10-23 18:41:41,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 18:41:41,645 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-23 18:41:41,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:41:41,646 INFO L225 Difference]: With dead ends: 53 [2020-10-23 18:41:41,646 INFO L226 Difference]: Without dead ends: 41 [2020-10-23 18:41:41,647 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 [2020-10-23 18:41:41,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-23 18:41:41,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2020-10-23 18:41:41,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-23 18:41:41,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-10-23 18:41:41,656 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 27 [2020-10-23 18:41:41,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:41:41,657 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-10-23 18:41:41,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:41:41,657 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-10-23 18:41:41,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-23 18:41:41,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:41,659 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] [2020-10-23 18:41:41,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 18:41:41,659 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:41,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:41,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1607242461, now seen corresponding path program 1 times [2020-10-23 18:41:41,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:41,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306490618] [2020-10-23 18:41:41,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:41,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:41,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:41:41,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:41,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 18:41:41,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:41,989 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-23 18:41:41,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306490618] [2020-10-23 18:41:41,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851181249] [2020-10-23 18:41:41,991 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 [2020-10-23 18:41:42,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:42,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-23 18:41:42,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:41:42,203 INFO L384 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 [2020-10-23 18:41:42,203 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:41:42,218 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:41:42,219 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:41:42,219 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:20 [2020-10-23 18:41:42,274 INFO L350 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2020-10-23 18:41:42,275 INFO L384 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 [2020-10-23 18:41:42,276 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:41:42,288 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:41:42,288 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:41:42,289 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2020-10-23 18:41:42,385 INFO L350 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2020-10-23 18:41:42,386 INFO L384 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 [2020-10-23 18:41:42,391 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:41:42,393 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:41:42,398 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-10-23 18:41:42,422 INFO L625 ElimStorePlain]: treesize reduction 33, result has 17.5 percent of original size [2020-10-23 18:41:42,423 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:41:42,423 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:31, output treesize:7 [2020-10-23 18:41:42,452 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:41:42,499 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-23 18:41:42,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:41:42,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2020-10-23 18:41:42,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900025895] [2020-10-23 18:41:42,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-23 18:41:42,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:41:42,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-23 18:41:42,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-23 18:41:42,502 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 18 states. [2020-10-23 18:41:43,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:41:43,441 INFO L93 Difference]: Finished difference Result 88 states and 106 transitions. [2020-10-23 18:41:43,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-23 18:41:43,441 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 32 [2020-10-23 18:41:43,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:41:43,445 INFO L225 Difference]: With dead ends: 88 [2020-10-23 18:41:43,445 INFO L226 Difference]: Without dead ends: 85 [2020-10-23 18:41:43,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2020-10-23 18:41:43,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-23 18:41:43,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 50. [2020-10-23 18:41:43,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-23 18:41:43,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2020-10-23 18:41:43,467 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 32 [2020-10-23 18:41:43,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:41:43,468 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2020-10-23 18:41:43,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-23 18:41:43,471 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2020-10-23 18:41:43,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-23 18:41:43,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:43,473 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] [2020-10-23 18:41:43,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:41:43,688 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:43,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:43,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1349077023, now seen corresponding path program 1 times [2020-10-23 18:41:43,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:43,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338668580] [2020-10-23 18:41:43,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:43,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:41:43,725 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:41:43,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:41:43,791 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:41:43,836 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-23 18:41:43,840 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 18:41:43,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 18:41:43,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:41:43 BoogieIcfgContainer [2020-10-23 18:41:43,895 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:41:43,897 INFO L168 Benchmark]: Toolchain (without parser) took 5656.40 ms. Allocated memory was 155.2 MB in the beginning and 186.6 MB in the end (delta: 31.5 MB). Free memory was 131.0 MB in the beginning and 130.3 MB in the end (delta: 652.4 kB). Peak memory consumption was 33.0 MB. Max. memory is 8.0 GB. [2020-10-23 18:41:43,898 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 155.2 MB. Free memory is still 127.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:41:43,899 INFO L168 Benchmark]: CACSL2BoogieTranslator took 270.82 ms. Allocated memory is still 155.2 MB. Free memory was 130.3 MB in the beginning and 119.8 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-23 18:41:43,899 INFO L168 Benchmark]: Boogie Preprocessor took 95.08 ms. Allocated memory is still 155.2 MB. Free memory was 119.8 MB in the beginning and 118.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 18:41:43,900 INFO L168 Benchmark]: RCFGBuilder took 868.43 ms. Allocated memory is still 155.2 MB. Free memory was 118.2 MB in the beginning and 136.6 MB in the end (delta: -18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 8.0 GB. [2020-10-23 18:41:43,901 INFO L168 Benchmark]: TraceAbstraction took 4403.22 ms. Allocated memory was 155.2 MB in the beginning and 186.6 MB in the end (delta: 31.5 MB). Free memory was 136.1 MB in the beginning and 130.3 MB in the end (delta: 5.8 MB). Peak memory consumption was 37.7 MB. Max. memory is 8.0 GB. [2020-10-23 18:41:43,906 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 155.2 MB. Free memory is still 127.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 270.82 ms. Allocated memory is still 155.2 MB. Free memory was 130.3 MB in the beginning and 119.8 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 95.08 ms. Allocated memory is still 155.2 MB. Free memory was 119.8 MB in the beginning and 118.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 868.43 ms. Allocated memory is still 155.2 MB. Free memory was 118.2 MB in the beginning and 136.6 MB in the end (delta: -18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4403.22 ms. Allocated memory was 155.2 MB in the beginning and 186.6 MB in the end (delta: 31.5 MB). Free memory was 136.1 MB in the beginning and 130.3 MB in the end (delta: 5.8 MB). Peak memory consumption was 37.7 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: 4.2s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 1.6s, 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, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 104 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1.0s 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...