/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/loop-lit/ddlm2013.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:46:21,577 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:46:21,580 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:46:21,626 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 22:46:21,627 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 22:46:21,631 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 22:46:21,634 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 22:46:21,641 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 22:46:21,644 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 22:46:21,649 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 22:46:21,659 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 22:46:21,661 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 22:46:21,662 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 22:46:21,664 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 22:46:21,666 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 22:46:21,668 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 22:46:21,669 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 22:46:21,672 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 22:46:21,679 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 22:46:21,684 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 22:46:21,686 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 22:46:21,687 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 22:46:21,689 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 22:46:21,691 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 22:46:21,699 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-06 22:46:21,699 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-06 22:46:21,699 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-06 22:46:21,702 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-06 22:46:21,702 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-06 22:46:21,703 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-06 22:46:21,704 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-06 22:46:21,705 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-06 22:46:21,706 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-06 22:46:21,707 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-06 22:46:21,708 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-06 22:46:21,708 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-06 22:46:21,709 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-06 22:46:21,709 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-06 22:46:21,710 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:46:21,711 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:46:21,711 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:46:21,712 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-06 22:46:21,769 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:46:21,769 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:46:21,773 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:46:21,774 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:46:21,774 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:46:21,774 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:46:21,774 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:46:21,774 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:46:21,775 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:46:21,775 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:46:21,776 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:46:21,776 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:46:21,776 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:46:21,777 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:46:21,777 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:46:21,777 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:46:21,777 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:46:21,778 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:46:21,778 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:46:21,778 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:46:21,778 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:46:21,779 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:46:21,779 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:46:21,779 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:46:21,779 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:46:21,779 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:46:21,780 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:46:21,780 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:46:21,780 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:46:21,780 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:46:22,136 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:46:22,170 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:46:22,172 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:46:22,174 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:46:22,174 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:46:22,175 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/ddlm2013.i [2020-11-06 22:46:22,268 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7dd8a1803/ffedce6604664c31a9ecc743dcf34e2b/FLAGde952f736 [2020-11-06 22:46:22,880 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:46:22,882 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/ddlm2013.i [2020-11-06 22:46:22,891 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7dd8a1803/ffedce6604664c31a9ecc743dcf34e2b/FLAGde952f736 [2020-11-06 22:46:23,219 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7dd8a1803/ffedce6604664c31a9ecc743dcf34e2b [2020-11-06 22:46:23,223 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:46:23,231 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:46:23,235 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:46:23,235 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:46:23,239 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:46:23,240 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:46:23" (1/1) ... [2020-11-06 22:46:23,245 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6507d4a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:23, skipping insertion in model container [2020-11-06 22:46:23,245 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:46:23" (1/1) ... [2020-11-06 22:46:23,255 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:46:23,279 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:46:23,471 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:46:23,481 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:46:23,501 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:46:23,518 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:46:23,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:23 WrapperNode [2020-11-06 22:46:23,519 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:46:23,520 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:46:23,520 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:46:23,520 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:46:23,533 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:23" (1/1) ... [2020-11-06 22:46:23,534 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:23" (1/1) ... [2020-11-06 22:46:23,542 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:23" (1/1) ... [2020-11-06 22:46:23,542 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:23" (1/1) ... [2020-11-06 22:46:23,549 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:23" (1/1) ... [2020-11-06 22:46:23,553 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:23" (1/1) ... [2020-11-06 22:46:23,555 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:23" (1/1) ... [2020-11-06 22:46:23,557 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:46:23,558 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:46:23,558 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:46:23,559 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:46:23,559 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:23" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:46:23,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:46:23,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:46:23,641 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:46:23,641 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-06 22:46:23,641 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-06 22:46:23,641 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:46:23,642 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:46:23,642 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:46:23,642 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-11-06 22:46:23,642 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-11-06 22:46:23,642 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:46:23,642 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:46:23,643 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-06 22:46:23,643 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-06 22:46:23,643 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-06 22:46:23,643 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:46:23,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:46:23,643 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:46:23,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:46:23,644 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:46:23,644 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:46:23,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:46:24,032 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:46:24,033 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-06 22:46:24,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:46:24 BoogieIcfgContainer [2020-11-06 22:46:24,037 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:46:24,041 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:46:24,041 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:46:24,044 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:46:24,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:46:23" (1/3) ... [2020-11-06 22:46:24,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56b3bbd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:46:24, skipping insertion in model container [2020-11-06 22:46:24,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:23" (2/3) ... [2020-11-06 22:46:24,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56b3bbd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:46:24, skipping insertion in model container [2020-11-06 22:46:24,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:46:24" (3/3) ... [2020-11-06 22:46:24,049 INFO L111 eAbstractionObserver]: Analyzing ICFG ddlm2013.i [2020-11-06 22:46:24,065 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:46:24,068 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:46:24,086 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:46:24,124 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:46:24,124 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:46:24,124 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:46:24,125 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:46:24,125 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:46:24,125 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:46:24,125 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:46:24,125 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:46:24,202 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-11-06 22:46:24,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-06 22:46:24,214 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:46:24,215 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:46:24,216 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:46:24,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:46:24,223 INFO L82 PathProgramCache]: Analyzing trace with hash -2013076175, now seen corresponding path program 1 times [2020-11-06 22:46:24,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:46:24,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551910962] [2020-11-06 22:46:24,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:46:24,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:24,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:46:24,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:24,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:46:24,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551910962] [2020-11-06 22:46:24,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:46:24,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-06 22:46:24,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891383707] [2020-11-06 22:46:24,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-06 22:46:24,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:46:24,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-06 22:46:24,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-06 22:46:24,583 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 3 states. [2020-11-06 22:46:24,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:46:24,680 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2020-11-06 22:46:24,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-06 22:46:24,683 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-11-06 22:46:24,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:46:24,693 INFO L225 Difference]: With dead ends: 43 [2020-11-06 22:46:24,693 INFO L226 Difference]: Without dead ends: 18 [2020-11-06 22:46:24,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-06 22:46:24,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-11-06 22:46:24,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-11-06 22:46:24,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-06 22:46:24,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-11-06 22:46:24,753 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 15 [2020-11-06 22:46:24,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:46:24,754 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-11-06 22:46:24,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-06 22:46:24,754 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-11-06 22:46:24,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-06 22:46:24,756 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:46:24,756 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:46:24,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:46:24,757 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:46:24,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:46:24,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1804204828, now seen corresponding path program 1 times [2020-11-06 22:46:24,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:46:24,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437174648] [2020-11-06 22:46:24,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:46:24,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:24,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:46:24,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:24,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:46:24,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437174648] [2020-11-06 22:46:24,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:46:24,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-06 22:46:24,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43011327] [2020-11-06 22:46:25,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:46:25,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:46:25,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:46:25,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:46:25,002 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 6 states. [2020-11-06 22:46:25,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:46:25,315 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-11-06 22:46:25,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 22:46:25,316 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-11-06 22:46:25,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:46:25,318 INFO L225 Difference]: With dead ends: 28 [2020-11-06 22:46:25,318 INFO L226 Difference]: Without dead ends: 20 [2020-11-06 22:46:25,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:46:25,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-11-06 22:46:25,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-11-06 22:46:25,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-06 22:46:25,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-11-06 22:46:25,327 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 16 [2020-11-06 22:46:25,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:46:25,327 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-11-06 22:46:25,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:46:25,328 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-11-06 22:46:25,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-06 22:46:25,328 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:46:25,329 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:46:25,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 22:46:25,329 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:46:25,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:46:25,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1289977208, now seen corresponding path program 1 times [2020-11-06 22:46:25,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:46:25,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689259515] [2020-11-06 22:46:25,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:46:25,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:25,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:46:25,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:25,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:46:25,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689259515] [2020-11-06 22:46:25,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347538740] [2020-11-06 22:46:25,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:46:25,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:25,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-06 22:46:25,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:46:25,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:46:25,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:46:25,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2020-11-06 22:46:25,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023479021] [2020-11-06 22:46:25,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-06 22:46:25,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:46:25,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-06 22:46:25,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-11-06 22:46:25,890 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 11 states. [2020-11-06 22:46:26,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:46:26,322 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2020-11-06 22:46:26,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-06 22:46:26,323 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2020-11-06 22:46:26,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:46:26,324 INFO L225 Difference]: With dead ends: 33 [2020-11-06 22:46:26,324 INFO L226 Difference]: Without dead ends: 25 [2020-11-06 22:46:26,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-11-06 22:46:26,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-06 22:46:26,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2020-11-06 22:46:26,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-06 22:46:26,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-11-06 22:46:26,331 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 19 [2020-11-06 22:46:26,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:46:26,331 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-11-06 22:46:26,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-06 22:46:26,332 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-11-06 22:46:26,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-06 22:46:26,333 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:46:26,333 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:46:26,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-06 22:46:26,534 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:46:26,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:46:26,536 INFO L82 PathProgramCache]: Analyzing trace with hash 703171194, now seen corresponding path program 1 times [2020-11-06 22:46:26,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:46:26,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648865427] [2020-11-06 22:46:26,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:46:26,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:26,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:46:26,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:26,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-06 22:46:26,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648865427] [2020-11-06 22:46:26,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:46:26,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:46:26,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389627992] [2020-11-06 22:46:26,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:46:26,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:46:26,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:46:26,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:46:26,613 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 4 states. [2020-11-06 22:46:26,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:46:26,709 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-11-06 22:46:26,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:46:26,710 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-11-06 22:46:26,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:46:26,711 INFO L225 Difference]: With dead ends: 36 [2020-11-06 22:46:26,711 INFO L226 Difference]: Without dead ends: 23 [2020-11-06 22:46:26,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:46:26,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-06 22:46:26,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-11-06 22:46:26,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-06 22:46:26,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-11-06 22:46:26,717 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 19 [2020-11-06 22:46:26,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:46:26,718 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-11-06 22:46:26,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:46:26,718 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-11-06 22:46:26,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-06 22:46:26,719 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:46:26,719 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:46:26,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-06 22:46:26,719 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:46:26,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:46:26,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1478904932, now seen corresponding path program 2 times [2020-11-06 22:46:26,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:46:26,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772100354] [2020-11-06 22:46:26,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:46:26,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:27,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:46:27,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:27,027 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:46:27,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772100354] [2020-11-06 22:46:27,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627054046] [2020-11-06 22:46:27,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:46:27,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:46:27,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:46:27,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-06 22:46:27,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:46:27,306 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:46:27,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:46:27,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2020-11-06 22:46:27,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534375775] [2020-11-06 22:46:27,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-06 22:46:27,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:46:27,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-06 22:46:27,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-11-06 22:46:27,308 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 15 states. [2020-11-06 22:46:27,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:46:27,919 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2020-11-06 22:46:27,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-06 22:46:27,921 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 22 [2020-11-06 22:46:27,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:46:27,922 INFO L225 Difference]: With dead ends: 43 [2020-11-06 22:46:27,922 INFO L226 Difference]: Without dead ends: 26 [2020-11-06 22:46:27,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2020-11-06 22:46:27,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-11-06 22:46:27,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-11-06 22:46:27,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-06 22:46:27,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-11-06 22:46:27,929 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 22 [2020-11-06 22:46:27,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:46:27,930 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-11-06 22:46:27,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-06 22:46:27,930 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-11-06 22:46:27,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-06 22:46:27,931 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:46:27,931 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:46:28,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:46:28,145 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:46:28,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:46:28,146 INFO L82 PathProgramCache]: Analyzing trace with hash -877394440, now seen corresponding path program 3 times [2020-11-06 22:46:28,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:46:28,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856196611] [2020-11-06 22:46:28,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:46:28,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:28,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:46:28,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:28,573 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:46:28,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856196611] [2020-11-06 22:46:28,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507395946] [2020-11-06 22:46:28,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:46:28,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-06 22:46:28,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:46:28,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-06 22:46:28,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:46:29,001 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:46:29,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:46:29,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2020-11-06 22:46:29,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743326982] [2020-11-06 22:46:29,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-06 22:46:29,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:46:29,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-06 22:46:29,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2020-11-06 22:46:29,006 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 19 states. [2020-11-06 22:46:30,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:46:30,356 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2020-11-06 22:46:30,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-06 22:46:30,357 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 25 [2020-11-06 22:46:30,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:46:30,359 INFO L225 Difference]: With dead ends: 60 [2020-11-06 22:46:30,359 INFO L226 Difference]: Without dead ends: 37 [2020-11-06 22:46:30,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=160, Invalid=896, Unknown=0, NotChecked=0, Total=1056 [2020-11-06 22:46:30,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-06 22:46:30,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-11-06 22:46:30,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-06 22:46:30,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-11-06 22:46:30,366 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 25 [2020-11-06 22:46:30,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:46:30,367 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-11-06 22:46:30,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-06 22:46:30,367 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-11-06 22:46:30,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-06 22:46:30,368 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:46:30,368 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:46:30,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:46:30,582 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:46:30,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:46:30,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1033305882, now seen corresponding path program 1 times [2020-11-06 22:46:30,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:46:30,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457381629] [2020-11-06 22:46:30,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:46:30,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:30,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:46:30,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:30,751 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-06 22:46:30,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457381629] [2020-11-06 22:46:30,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903935100] [2020-11-06 22:46:30,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:46:30,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:30,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-06 22:46:30,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:46:30,901 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-06 22:46:30,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:46:30,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2020-11-06 22:46:30,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102841783] [2020-11-06 22:46:30,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-06 22:46:30,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:46:30,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-06 22:46:30,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-11-06 22:46:30,904 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 8 states. [2020-11-06 22:46:31,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:46:31,339 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2020-11-06 22:46:31,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-06 22:46:31,340 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-11-06 22:46:31,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:46:31,341 INFO L225 Difference]: With dead ends: 48 [2020-11-06 22:46:31,341 INFO L226 Difference]: Without dead ends: 35 [2020-11-06 22:46:31,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-11-06 22:46:31,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-06 22:46:31,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-11-06 22:46:31,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-06 22:46:31,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-11-06 22:46:31,348 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 28 [2020-11-06 22:46:31,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:46:31,349 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-11-06 22:46:31,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-06 22:46:31,349 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-11-06 22:46:31,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-06 22:46:31,350 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:46:31,350 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:46:31,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:46:31,564 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:46:31,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:46:31,565 INFO L82 PathProgramCache]: Analyzing trace with hash 962853732, now seen corresponding path program 4 times [2020-11-06 22:46:31,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:46:31,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767329603] [2020-11-06 22:46:31,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:46:31,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:32,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:46:32,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:32,324 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:46:32,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767329603] [2020-11-06 22:46:32,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025786319] [2020-11-06 22:46:32,325 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:46:32,421 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-06 22:46:32,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:46:32,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 55 conjunts are in the unsatisfiable core [2020-11-06 22:46:32,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:46:33,220 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:46:33,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:46:33,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 31 [2020-11-06 22:46:33,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134873805] [2020-11-06 22:46:33,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-06 22:46:33,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:46:33,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-06 22:46:33,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2020-11-06 22:46:33,224 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 31 states. [2020-11-06 22:46:34,654 WARN L194 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2020-11-06 22:46:34,858 WARN L194 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2020-11-06 22:46:35,082 WARN L194 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2020-11-06 22:46:35,310 WARN L194 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 50 [2020-11-06 22:46:35,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:46:35,493 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-11-06 22:46:35,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-06 22:46:35,494 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-11-06 22:46:35,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:46:35,495 INFO L225 Difference]: With dead ends: 40 [2020-11-06 22:46:35,495 INFO L226 Difference]: Without dead ends: 0 [2020-11-06 22:46:35,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=301, Invalid=2051, Unknown=0, NotChecked=0, Total=2352 [2020-11-06 22:46:35,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-06 22:46:35,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-06 22:46:35,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-06 22:46:35,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-06 22:46:35,498 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 34 [2020-11-06 22:46:35,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:46:35,498 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-06 22:46:35,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-11-06 22:46:35,499 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-06 22:46:35,499 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-06 22:46:35,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:46:35,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-06 22:46:36,031 WARN L194 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 15 [2020-11-06 22:46:36,045 INFO L266 CegarLoopResult]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2020-11-06 22:46:36,046 INFO L269 CegarLoopResult]: At program point reach_errorENTRY(line 12) the Hoare annotation is: true [2020-11-06 22:46:36,046 INFO L266 CegarLoopResult]: For program point L12-1(line 12) no Hoare annotation was computed. [2020-11-06 22:46:36,046 INFO L266 CegarLoopResult]: For program point L12-2(line 12) no Hoare annotation was computed. [2020-11-06 22:46:36,046 INFO L266 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-11-06 22:46:36,046 INFO L266 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:46:36,046 INFO L262 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string0.offset| |old(#t~string0.offset)|) (= |old(#length)| |#length|) (= |#t~string1.base| |old(#t~string1.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string0.base| |old(#t~string0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= |#t~string1.offset| |old(#t~string1.offset)|)) [2020-11-06 22:46:36,046 INFO L266 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:46:36,046 INFO L266 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:46:36,047 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-06 22:46:36,047 INFO L269 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-11-06 22:46:36,047 INFO L266 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:46:36,047 INFO L266 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-11-06 22:46:36,047 INFO L266 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2020-11-06 22:46:36,047 INFO L266 CegarLoopResult]: For program point L15-2(lines 14 16) no Hoare annotation was computed. [2020-11-06 22:46:36,047 INFO L266 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2020-11-06 22:46:36,047 INFO L266 CegarLoopResult]: For program point L35-2(lines 24 49) no Hoare annotation was computed. [2020-11-06 22:46:36,048 INFO L266 CegarLoopResult]: For program point mainEXIT(lines 24 49) no Hoare annotation was computed. [2020-11-06 22:46:36,048 INFO L262 CegarLoopResult]: At program point L46(line 46) the Hoare annotation is: (let ((.cse2 (div main_~a~0 4294967296)) (.cse3 (div main_~b~0 4294967296))) (let ((.cse1 (* 4294967296 .cse3)) (.cse0 (+ (* 4294967296 .cse2) main_~b~0))) (and (< .cse0 (+ .cse1 main_~a~0 1)) (<= (+ .cse1 main_~a~0) .cse0) (<= .cse2 .cse3)))) [2020-11-06 22:46:36,048 INFO L266 CegarLoopResult]: For program point mainFINAL(lines 24 49) no Hoare annotation was computed. [2020-11-06 22:46:36,048 INFO L266 CegarLoopResult]: For program point L30(lines 30 34) no Hoare annotation was computed. [2020-11-06 22:46:36,048 INFO L269 CegarLoopResult]: At program point mainENTRY(lines 24 49) the Hoare annotation is: true [2020-11-06 22:46:36,048 INFO L266 CegarLoopResult]: For program point L45(lines 45 47) no Hoare annotation was computed. [2020-11-06 22:46:36,049 INFO L266 CegarLoopResult]: For program point L39(lines 39 43) no Hoare annotation was computed. [2020-11-06 22:46:36,049 INFO L266 CegarLoopResult]: For program point L39-2(lines 24 49) no Hoare annotation was computed. [2020-11-06 22:46:36,049 INFO L266 CegarLoopResult]: For program point L35(lines 35 44) no Hoare annotation was computed. [2020-11-06 22:46:36,049 INFO L266 CegarLoopResult]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2020-11-06 22:46:36,050 INFO L269 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2020-11-06 22:46:36,050 INFO L266 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2020-11-06 22:46:36,050 INFO L262 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-11-06 22:46:36,050 INFO L266 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-11-06 22:46:36,050 INFO L266 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-11-06 22:46:36,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:46:36 BoogieIcfgContainer [2020-11-06 22:46:36,057 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:46:36,058 INFO L168 Benchmark]: Toolchain (without parser) took 12832.07 ms. Allocated memory was 151.0 MB in the beginning and 219.2 MB in the end (delta: 68.2 MB). Free memory was 126.3 MB in the beginning and 115.2 MB in the end (delta: 11.2 MB). Peak memory consumption was 80.4 MB. Max. memory is 8.0 GB. [2020-11-06 22:46:36,059 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 151.0 MB. Free memory is still 122.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:46:36,060 INFO L168 Benchmark]: CACSL2BoogieTranslator took 284.27 ms. Allocated memory is still 151.0 MB. Free memory was 125.8 MB in the beginning and 116.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-11-06 22:46:36,066 INFO L168 Benchmark]: Boogie Preprocessor took 37.67 ms. Allocated memory is still 151.0 MB. Free memory was 116.2 MB in the beginning and 114.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-06 22:46:36,067 INFO L168 Benchmark]: RCFGBuilder took 478.72 ms. Allocated memory is still 151.0 MB. Free memory was 114.8 MB in the beginning and 100.3 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2020-11-06 22:46:36,069 INFO L168 Benchmark]: TraceAbstraction took 12015.98 ms. Allocated memory was 151.0 MB in the beginning and 219.2 MB in the end (delta: 68.2 MB). Free memory was 99.9 MB in the beginning and 115.2 MB in the end (delta: -15.3 MB). Peak memory consumption was 54.2 MB. Max. memory is 8.0 GB. [2020-11-06 22:46:36,078 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 151.0 MB. Free memory is still 122.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 284.27 ms. Allocated memory is still 151.0 MB. Free memory was 125.8 MB in the beginning and 116.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 37.67 ms. Allocated memory is still 151.0 MB. Free memory was 116.2 MB in the beginning and 114.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 478.72 ms. Allocated memory is still 151.0 MB. Free memory was 114.8 MB in the beginning and 100.3 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 12015.98 ms. Allocated memory was 151.0 MB in the beginning and 219.2 MB in the end (delta: 68.2 MB). Free memory was 99.9 MB in the beginning and 115.2 MB in the end (delta: -15.3 MB). Peak memory consumption was 54.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: 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 6 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 11.5s, OverallIterations: 8, TraceHistogramMax: 7, AutomataDifference: 5.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 153 SDtfs, 212 SDslu, 233 SDs, 0 SdLazy, 917 SolverSat, 102 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 252 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 6.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=6, 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, 8 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 41 PreInvPairs, 50 NumberOfFragments, 72 HoareAnnotationTreeSize, 41 FomulaSimplifications, 144 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 8 FomulaSimplificationsInter, 415 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.7s InterpolantComputationTime, 306 NumberOfCodeBlocks, 306 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 293 ConstructedInterpolants, 0 QuantifiedInterpolants, 68779 SizeOfPredicates, 13 NumberOfNonLiveVariables, 657 ConjunctsInSsa, 133 ConjunctsInUnsatCore, 13 InterpolantComputations, 3 PerfectInterpolantSequences, 36/216 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...