/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/verifythis/elimination_max_rec.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:21:35,551 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:21:35,556 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:21:35,616 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:21:35,617 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:21:35,622 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:21:35,627 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:21:35,636 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:21:35,639 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:21:35,645 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:21:35,647 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:21:35,648 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:21:35,649 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:21:35,652 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:21:35,655 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:21:35,658 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:21:35,659 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:21:35,663 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:21:35,687 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:21:35,695 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:21:35,697 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:21:35,699 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:21:35,700 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:21:35,703 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:21:35,713 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 18:21:35,725 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:21:35,726 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:21:35,727 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:21:35,728 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 18:21:35,787 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:21:35,787 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:21:35,791 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:21:35,792 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:21:35,792 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:21:35,792 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:21:35,793 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:21:35,793 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:21:35,793 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:21:35,794 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:21:35,795 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:21:35,795 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:21:35,795 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:21:35,796 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:21:35,796 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:21:35,796 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:21:35,796 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:21:35,797 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:21:35,797 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:21:35,797 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:21:35,797 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:21:35,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:21:35,798 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:21:35,798 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:21:35,798 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:21:35,799 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:21:35,799 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:21:35,799 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:21:35,799 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:21:35,800 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:21:36,183 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:21:36,226 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:21:36,230 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:21:36,231 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:21:36,232 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:21:36,233 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/elimination_max_rec.c [2020-10-23 18:21:36,315 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/292fea3b9/48071e61b87944249bcb73c415b58362/FLAGbf3a32ef7 [2020-10-23 18:21:36,898 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:21:36,899 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/elimination_max_rec.c [2020-10-23 18:21:36,907 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/292fea3b9/48071e61b87944249bcb73c415b58362/FLAGbf3a32ef7 [2020-10-23 18:21:37,264 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/292fea3b9/48071e61b87944249bcb73c415b58362 [2020-10-23 18:21:37,267 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:21:37,282 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:21:37,286 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:21:37,287 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:21:37,291 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:21:37,291 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:21:37" (1/1) ... [2020-10-23 18:21:37,297 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37ff180f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:21:37, skipping insertion in model container [2020-10-23 18:21:37,297 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:21:37" (1/1) ... [2020-10-23 18:21:37,305 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:21:37,327 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:21:37,490 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:21:37,506 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:21:37,528 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:21:37,548 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:21:37,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:21:37 WrapperNode [2020-10-23 18:21:37,549 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:21:37,550 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:21:37,550 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:21:37,550 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:21:37,565 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:21:37" (1/1) ... [2020-10-23 18:21:37,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:21:37" (1/1) ... [2020-10-23 18:21:37,574 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:21:37" (1/1) ... [2020-10-23 18:21:37,574 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:21:37" (1/1) ... [2020-10-23 18:21:37,584 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:21:37" (1/1) ... [2020-10-23 18:21:37,586 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:21:37" (1/1) ... [2020-10-23 18:21:37,588 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:21:37" (1/1) ... [2020-10-23 18:21:37,591 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:21:37,592 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:21:37,593 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:21:37,593 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:21:37,594 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:21:37" (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 18:21:37,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:21:37,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:21:37,670 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:21:37,670 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 18:21:37,670 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 18:21:37,670 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-10-23 18:21:37,670 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:21:37,670 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-10-23 18:21:37,671 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-23 18:21:37,671 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-23 18:21:37,671 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:21:37,671 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:21:37,671 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:21:37,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:21:37,672 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 18:21:37,672 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 18:21:37,672 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 18:21:37,672 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-23 18:21:37,673 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:21:37,673 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:21:37,673 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-23 18:21:37,673 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-10-23 18:21:37,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:21:37,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:21:37,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:21:37,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:21:37,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:21:38,183 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:21:38,184 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 18:21:38,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:21:38 BoogieIcfgContainer [2020-10-23 18:21:38,186 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:21:38,188 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:21:38,188 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:21:38,192 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:21:38,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:21:37" (1/3) ... [2020-10-23 18:21:38,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ffced75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:21:38, skipping insertion in model container [2020-10-23 18:21:38,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:21:37" (2/3) ... [2020-10-23 18:21:38,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ffced75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:21:38, skipping insertion in model container [2020-10-23 18:21:38,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:21:38" (3/3) ... [2020-10-23 18:21:38,195 INFO L111 eAbstractionObserver]: Analyzing ICFG elimination_max_rec.c [2020-10-23 18:21:38,208 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:21:38,229 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:21:38,242 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:21:38,272 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:21:38,273 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:21:38,273 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:21:38,273 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:21:38,273 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:21:38,273 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:21:38,274 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:21:38,274 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:21:38,293 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2020-10-23 18:21:38,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-23 18:21:38,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:21:38,301 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 18:21:38,301 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:21:38,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:21:38,308 INFO L82 PathProgramCache]: Analyzing trace with hash 2109147679, now seen corresponding path program 1 times [2020-10-23 18:21:38,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:21:38,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604469937] [2020-10-23 18:21:38,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:21:38,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:38,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:21:38,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:38,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:21:38,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:38,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-23 18:21:38,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:38,625 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 18:21:38,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604469937] [2020-10-23 18:21:38,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:21:38,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:21:38,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801634543] [2020-10-23 18:21:38,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:21:38,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:21:38,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:21:38,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:21:38,652 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 4 states. [2020-10-23 18:21:38,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:21:38,950 INFO L93 Difference]: Finished difference Result 82 states and 100 transitions. [2020-10-23 18:21:38,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 18:21:38,952 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-23 18:21:38,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:21:38,962 INFO L225 Difference]: With dead ends: 82 [2020-10-23 18:21:38,963 INFO L226 Difference]: Without dead ends: 38 [2020-10-23 18:21:38,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:21:38,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-23 18:21:39,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-23 18:21:39,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-23 18:21:39,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-10-23 18:21:39,021 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 25 [2020-10-23 18:21:39,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:21:39,022 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-10-23 18:21:39,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:21:39,022 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-10-23 18:21:39,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-23 18:21:39,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:21:39,032 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 18:21:39,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:21:39,033 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:21:39,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:21:39,034 INFO L82 PathProgramCache]: Analyzing trace with hash 520799777, now seen corresponding path program 1 times [2020-10-23 18:21:39,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:21:39,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125644765] [2020-10-23 18:21:39,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:21:39,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:39,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:21:39,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:39,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:21:39,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:39,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-23 18:21:39,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:39,315 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 18:21:39,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125644765] [2020-10-23 18:21:39,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:21:39,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 18:21:39,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212733] [2020-10-23 18:21:39,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 18:21:39,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:21:39,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 18:21:39,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-23 18:21:39,323 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 8 states. [2020-10-23 18:21:40,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:21:40,046 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2020-10-23 18:21:40,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 18:21:40,047 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-10-23 18:21:40,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:21:40,051 INFO L225 Difference]: With dead ends: 66 [2020-10-23 18:21:40,051 INFO L226 Difference]: Without dead ends: 63 [2020-10-23 18:21:40,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-10-23 18:21:40,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-23 18:21:40,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2020-10-23 18:21:40,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-23 18:21:40,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2020-10-23 18:21:40,072 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 25 [2020-10-23 18:21:40,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:21:40,073 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2020-10-23 18:21:40,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 18:21:40,073 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2020-10-23 18:21:40,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-23 18:21:40,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:21:40,075 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:21:40,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 18:21:40,075 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:21:40,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:21:40,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1305446031, now seen corresponding path program 1 times [2020-10-23 18:21:40,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:21:40,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112211984] [2020-10-23 18:21:40,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:21:40,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:40,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:21:40,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:40,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:21:40,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:40,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-23 18:21:40,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:40,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-23 18:21:40,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:40,294 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:21:40,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112211984] [2020-10-23 18:21:40,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503684812] [2020-10-23 18:21:40,295 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 18:21:40,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:40,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-23 18:21:40,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:21:40,752 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:21:40,760 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:21:40,770 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:21:40,846 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:21:40,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:21:40,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 14 [2020-10-23 18:21:40,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853493818] [2020-10-23 18:21:40,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 18:21:40,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:21:40,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 18:21:40,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-23 18:21:40,853 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand 8 states. [2020-10-23 18:21:41,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:21:41,130 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2020-10-23 18:21:41,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 18:21:41,131 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-10-23 18:21:41,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:21:41,135 INFO L225 Difference]: With dead ends: 70 [2020-10-23 18:21:41,136 INFO L226 Difference]: Without dead ends: 67 [2020-10-23 18:21:41,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-10-23 18:21:41,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-23 18:21:41,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 42. [2020-10-23 18:21:41,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-23 18:21:41,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-10-23 18:21:41,162 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 35 [2020-10-23 18:21:41,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:21:41,162 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-10-23 18:21:41,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 18:21:41,163 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-10-23 18:21:41,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-23 18:21:41,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:21:41,166 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:21:41,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-23 18:21:41,382 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:21:41,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:21:41,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1310958683, now seen corresponding path program 1 times [2020-10-23 18:21:41,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:21:41,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641618082] [2020-10-23 18:21:41,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:21:41,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:41,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:21:41,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:41,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:21:41,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:41,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-23 18:21:41,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:41,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-23 18:21:41,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:41,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-23 18:21:41,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:41,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-23 18:21:41,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:41,612 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-23 18:21:41,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641618082] [2020-10-23 18:21:41,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79934335] [2020-10-23 18:21:41,613 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 18:21:41,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:21:41,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-23 18:21:41,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:21:41,759 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 7 treesize of output 6 [2020-10-23 18:21:41,760 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:21:41,768 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:21:41,768 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:21:41,769 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:7, output treesize:6 [2020-10-23 18:21:43,803 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_1 Int)) (= (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_1) ((as const (Array Int Int)) 0))) is different from true [2020-10-23 18:21:45,866 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_2 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_2))) is different from true [2020-10-23 18:21:47,940 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_3 Int)) (= (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_3) ((as const (Array Int Int)) 0))) is different from true [2020-10-23 18:21:47,980 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2020-10-23 18:21:47,982 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:21:47,994 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:21:47,997 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-10-23 18:21:47,997 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:29, output treesize:21 [2020-10-23 18:21:48,054 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:21:48,112 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2020-10-23 18:21:48,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:21:48,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 18 [2020-10-23 18:21:48,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952923381] [2020-10-23 18:21:48,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-23 18:21:48,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:21:48,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-23 18:21:48,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=183, Unknown=3, NotChecked=84, Total=306 [2020-10-23 18:21:48,115 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 18 states. [2020-10-23 18:21:52,656 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 40 [2020-10-23 18:21:54,773 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 43 [2020-10-23 18:22:03,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:22:03,251 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-10-23 18:22:03,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-23 18:22:03,253 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2020-10-23 18:22:03,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:22:03,254 INFO L225 Difference]: With dead ends: 48 [2020-10-23 18:22:03,254 INFO L226 Difference]: Without dead ends: 0 [2020-10-23 18:22:03,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=105, Invalid=500, Unknown=7, NotChecked=144, Total=756 [2020-10-23 18:22:03,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-23 18:22:03,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-23 18:22:03,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-23 18:22:03,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-23 18:22:03,256 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 44 [2020-10-23 18:22:03,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:22:03,257 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-23 18:22:03,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-23 18:22:03,257 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-23 18:22:03,262 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-23 18:22:03,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:22:03,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-23 18:22:03,958 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 37 [2020-10-23 18:22:04,113 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 33 [2020-10-23 18:22:04,378 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 34 [2020-10-23 18:22:04,381 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 5) no Hoare annotation was computed. [2020-10-23 18:22:04,382 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 5) the Hoare annotation is: true [2020-10-23 18:22:04,382 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 5) no Hoare annotation was computed. [2020-10-23 18:22:04,382 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-10-23 18:22:04,382 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:22:04,382 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |old(#NULL.base)| |#NULL.base|) (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#t~string6.offset)| |#t~string6.offset|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |#t~string7.offset| |old(#t~string7.offset)|) (= |old(#t~string7.base)| |#t~string7.base|) (= |old(#valid)| |#valid|)) [2020-10-23 18:22:04,383 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:22:04,383 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:22:04,383 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-23 18:22:04,383 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-23 18:22:04,383 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:22:04,383 INFO L277 CegarLoopResult]: At program point assume_abort_if_notENTRY(lines 7 9) the Hoare annotation is: true [2020-10-23 18:22:04,383 INFO L274 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-10-23 18:22:04,383 INFO L274 CegarLoopResult]: For program point L8-2(lines 7 9) no Hoare annotation was computed. [2020-10-23 18:22:04,383 INFO L274 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2020-10-23 18:22:04,384 INFO L270 CegarLoopResult]: At program point L46(line 46) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (and (= (select |#memory_int| main_~a~0.base) .cse0) (= .cse0 (select |#memory_int| |main_#t~malloc17.base|)))) [2020-10-23 18:22:04,384 INFO L270 CegarLoopResult]: At program point mainENTRY(lines 41 50) the Hoare annotation is: (and (= |old(#length)| |#length|) (= |#memory_int| |old(#memory_int)|) (= |old(#valid)| |#valid|)) [2020-10-23 18:22:04,384 INFO L270 CegarLoopResult]: At program point L45(line 45) the Hoare annotation is: (= |#memory_int| |old(#memory_int)|) [2020-10-23 18:22:04,384 INFO L274 CegarLoopResult]: For program point L46-1(line 46) no Hoare annotation was computed. [2020-10-23 18:22:04,384 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 41 50) no Hoare annotation was computed. [2020-10-23 18:22:04,384 INFO L270 CegarLoopResult]: At program point L44(line 44) the Hoare annotation is: (and (= |old(#length)| |#length|) (= |#memory_int| |old(#memory_int)|) (= |old(#valid)| |#valid|)) [2020-10-23 18:22:04,385 INFO L274 CegarLoopResult]: For program point L45-1(line 45) no Hoare annotation was computed. [2020-10-23 18:22:04,385 INFO L274 CegarLoopResult]: For program point L44-1(line 44) no Hoare annotation was computed. [2020-10-23 18:22:04,385 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 41 50) no Hoare annotation was computed. [2020-10-23 18:22:04,385 INFO L270 CegarLoopResult]: At program point L33(line 33) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (or (not (<= (+ |check_#in~y| 1) |check_#in~n|)) (not (<= 0 |check_#in~x|)) (not (= (select |#memory_int| |check_#in~a.base|) .cse0)) (and (= (select |#memory_int| check_~a.base) .cse0) (let ((.cse1 (<= (+ check_~y 1) check_~n))) (or (and .cse1 (<= 1 check_~x)) (and (= |check_#in~x| 0) (<= 0 check_~x) .cse1)))))) [2020-10-23 18:22:04,385 INFO L274 CegarLoopResult]: For program point L33-1(line 33) no Hoare annotation was computed. [2020-10-23 18:22:04,385 INFO L277 CegarLoopResult]: At program point checkENTRY(lines 16 39) the Hoare annotation is: true [2020-10-23 18:22:04,385 INFO L274 CegarLoopResult]: For program point L28(line 28) no Hoare annotation was computed. [2020-10-23 18:22:04,385 INFO L274 CegarLoopResult]: For program point L25(lines 25 26) no Hoare annotation was computed. [2020-10-23 18:22:04,386 INFO L270 CegarLoopResult]: At program point L25-2(lines 25 26) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (or (not (<= (+ |check_#in~y| 1) |check_#in~n|)) (not (<= 0 |check_#in~x|)) (not (= (select |#memory_int| |check_#in~a.base|) .cse0)) (and (= (select |#memory_int| check_~a.base) .cse0) (let ((.cse1 (<= (+ check_~y 1) check_~n))) (or (and .cse1 (<= 1 check_~x)) (and (= |check_#in~x| 0) .cse1 (= check_~x 0))))))) [2020-10-23 18:22:04,386 INFO L270 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (or (not (<= (+ |check_#in~y| 1) |check_#in~n|)) (not (<= 0 |check_#in~x|)) (not (= (select |#memory_int| |check_#in~a.base|) .cse0)) (and (= (select |#memory_int| check_~a.base) .cse0) (let ((.cse1 (<= (+ check_~y 1) check_~n))) (or (and (= |check_#in~x| 0) .cse1 (= check_~x 0)) (and .cse1 (<= 1 |check_#in~x|) (<= 1 check_~x))))))) [2020-10-23 18:22:04,386 INFO L274 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-10-23 18:22:04,386 INFO L274 CegarLoopResult]: For program point checkEXIT(lines 16 39) no Hoare annotation was computed. [2020-10-23 18:22:04,386 INFO L274 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-10-23 18:22:04,387 INFO L274 CegarLoopResult]: For program point checkFINAL(lines 16 39) no Hoare annotation was computed. [2020-10-23 18:22:04,387 INFO L270 CegarLoopResult]: At program point L36(line 36) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (or (not (<= (+ |check_#in~y| 1) |check_#in~n|)) (and (= check_~ax~0 0) (= check_~ai~0 0) (= (select |#memory_int| check_~a.base) .cse0) (let ((.cse1 (<= (+ check_~y 1) check_~n))) (or (and .cse1 (<= 1 check_~x)) (and (= |check_#in~x| 0) (<= 0 check_~x) .cse1)))) (not (<= 0 |check_#in~x|)) (not (= (select |#memory_int| |check_#in~a.base|) .cse0)))) [2020-10-23 18:22:04,387 INFO L274 CegarLoopResult]: For program point L36-1(line 36) no Hoare annotation was computed. [2020-10-23 18:22:04,387 INFO L277 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 10 12) the Hoare annotation is: true [2020-10-23 18:22:04,387 INFO L274 CegarLoopResult]: For program point L11(line 11) no Hoare annotation was computed. [2020-10-23 18:22:04,387 INFO L270 CegarLoopResult]: At program point L11-1(line 11) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2020-10-23 18:22:04,388 INFO L274 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 10 12) no Hoare annotation was computed. [2020-10-23 18:22:04,411 INFO L274 CegarLoopResult]: For program point L11-2(line 11) no Hoare annotation was computed. [2020-10-23 18:22:04,411 INFO L274 CegarLoopResult]: For program point L11-4(lines 10 12) no Hoare annotation was computed. [2020-10-23 18:22:04,411 INFO L270 CegarLoopResult]: At program point #Ultimate.meminitENTRY(line -1) the Hoare annotation is: (= |#memory_int| |old(#memory_int)|) [2020-10-23 18:22:04,411 INFO L274 CegarLoopResult]: For program point #Ultimate.meminitEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:22:04,411 INFO L274 CegarLoopResult]: For program point #Ultimate.meminitFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:22:04,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:22:04 BoogieIcfgContainer [2020-10-23 18:22:04,417 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:22:04,419 INFO L168 Benchmark]: Toolchain (without parser) took 27142.62 ms. Allocated memory was 151.0 MB in the beginning and 200.3 MB in the end (delta: 49.3 MB). Free memory was 126.0 MB in the beginning and 181.4 MB in the end (delta: -55.4 MB). Peak memory consumption was 108.6 MB. Max. memory is 8.0 GB. [2020-10-23 18:22:04,420 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory was 122.9 MB in the beginning and 122.8 MB in the end (delta: 103.5 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:22:04,421 INFO L168 Benchmark]: CACSL2BoogieTranslator took 263.18 ms. Allocated memory is still 151.0 MB. Free memory was 125.3 MB in the beginning and 115.4 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-23 18:22:04,422 INFO L168 Benchmark]: Boogie Preprocessor took 41.30 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 113.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 18:22:04,423 INFO L168 Benchmark]: RCFGBuilder took 593.73 ms. Allocated memory is still 151.0 MB. Free memory was 113.7 MB in the beginning and 131.8 MB in the end (delta: -18.0 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. [2020-10-23 18:22:04,424 INFO L168 Benchmark]: TraceAbstraction took 26229.82 ms. Allocated memory was 151.0 MB in the beginning and 200.3 MB in the end (delta: 49.3 MB). Free memory was 131.3 MB in the beginning and 181.4 MB in the end (delta: -50.2 MB). Peak memory consumption was 112.9 MB. Max. memory is 8.0 GB. [2020-10-23 18:22:04,427 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory was 122.9 MB in the beginning and 122.8 MB in the end (delta: 103.5 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 263.18 ms. Allocated memory is still 151.0 MB. Free memory was 125.3 MB in the beginning and 115.4 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 41.30 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 113.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 593.73 ms. Allocated memory is still 151.0 MB. Free memory was 113.7 MB in the beginning and 131.8 MB in the end (delta: -18.0 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 26229.82 ms. Allocated memory was 151.0 MB in the beginning and 200.3 MB in the end (delta: 49.3 MB). Free memory was 131.3 MB in the beginning and 181.4 MB in the end (delta: -50.2 MB). Peak memory consumption was 112.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 8 procedures, 46 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 25.2s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 16.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.9s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 142 SDtfs, 233 SDslu, 251 SDs, 0 SdLazy, 653 SolverSat, 188 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 163 GetRequests, 101 SyntacticMatches, 5 SemanticMatches, 57 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 21.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=2, 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, 32 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 17 LocationsWithAnnotation, 44 PreInvPairs, 52 NumberOfFragments, 277 HoareAnnotationTreeSize, 44 FomulaSimplifications, 1192 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 17 FomulaSimplificationsInter, 842 FormulaSimplificationTreeSizeReductionInter, 0.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 7.5s InterpolantComputationTime, 208 NumberOfCodeBlocks, 208 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 202 ConstructedInterpolants, 13 QuantifiedInterpolants, 27395 SizeOfPredicates, 17 NumberOfNonLiveVariables, 416 ConjunctsInSsa, 30 ConjunctsInUnsatCore, 6 InterpolantComputations, 3 PerfectInterpolantSequences, 17/26 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 correct! Received shutdown request...