/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf -i ../../../trunk/examples/svcomp/loop-lit/ddlm2013.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-22 02:23:25,500 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 02:23:25,503 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 02:23:25,548 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-22 02:23:25,548 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-22 02:23:25,550 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-22 02:23:25,552 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-22 02:23:25,554 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-22 02:23:25,556 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-22 02:23:25,557 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-22 02:23:25,559 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-22 02:23:25,560 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-22 02:23:25,561 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-22 02:23:25,562 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-22 02:23:25,563 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-22 02:23:25,565 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-22 02:23:25,566 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-22 02:23:25,567 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-22 02:23:25,569 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-22 02:23:25,571 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-22 02:23:25,573 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-22 02:23:25,574 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-22 02:23:25,576 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-22 02:23:25,577 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-22 02:23:25,580 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-22 02:23:25,581 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-22 02:23:25,581 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-22 02:23:25,582 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-22 02:23:25,583 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-22 02:23:25,584 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-22 02:23:25,584 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-22 02:23:25,585 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-22 02:23:25,586 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-22 02:23:25,588 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-22 02:23:25,589 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-22 02:23:25,589 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-22 02:23:25,590 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-22 02:23:25,591 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-22 02:23:25,591 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-22 02:23:25,592 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-22 02:23:25,593 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-22 02:23:25,594 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-22 02:23:25,606 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 02:23:25,607 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 02:23:25,609 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 02:23:25,609 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 02:23:25,609 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 02:23:25,610 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 02:23:25,610 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 02:23:25,610 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 02:23:25,611 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 02:23:25,611 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 02:23:25,611 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 02:23:25,612 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 02:23:25,612 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 02:23:25,612 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 02:23:25,613 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 02:23:25,613 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 02:23:25,613 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 02:23:25,614 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 02:23:25,614 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 02:23:25,614 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 02:23:25,615 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 02:23:25,615 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 02:23:25,615 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 02:23:25,615 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 02:23:25,959 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 02:23:26,001 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 02:23:26,004 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 02:23:26,007 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 02:23:26,007 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 02:23:26,009 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/ddlm2013.i [2021-02-22 02:23:26,091 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b823393f/45aa95e328214ca295115b4ff05d4ff1/FLAG09186bd2c [2021-02-22 02:23:26,729 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 02:23:26,730 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/ddlm2013.i [2021-02-22 02:23:26,738 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b823393f/45aa95e328214ca295115b4ff05d4ff1/FLAG09186bd2c [2021-02-22 02:23:27,083 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b823393f/45aa95e328214ca295115b4ff05d4ff1 [2021-02-22 02:23:27,087 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 02:23:27,105 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 02:23:27,111 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 02:23:27,111 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 02:23:27,117 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 02:23:27,118 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:23:27" (1/1) ... [2021-02-22 02:23:27,119 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@438f34a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:23:27, skipping insertion in model container [2021-02-22 02:23:27,120 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:23:27" (1/1) ... [2021-02-22 02:23:27,130 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 02:23:27,150 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 02:23:27,384 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/ddlm2013.i[895,908] [2021-02-22 02:23:27,408 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:23:27,416 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 02:23:27,431 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/ddlm2013.i[895,908] [2021-02-22 02:23:27,436 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:23:27,453 INFO L208 MainTranslator]: Completed translation [2021-02-22 02:23:27,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:23:27 WrapperNode [2021-02-22 02:23:27,454 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 02:23:27,455 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 02:23:27,456 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 02:23:27,456 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 02:23:27,470 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:23:27" (1/1) ... [2021-02-22 02:23:27,470 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:23:27" (1/1) ... [2021-02-22 02:23:27,478 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:23:27" (1/1) ... [2021-02-22 02:23:27,479 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:23:27" (1/1) ... [2021-02-22 02:23:27,485 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:23:27" (1/1) ... [2021-02-22 02:23:27,490 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:23:27" (1/1) ... [2021-02-22 02:23:27,492 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:23:27" (1/1) ... [2021-02-22 02:23:27,494 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 02:23:27,495 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 02:23:27,495 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 02:23:27,495 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 02:23:27,496 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:23:27" (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 [2021-02-22 02:23:27,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 02:23:27,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 02:23:27,597 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 02:23:27,598 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-22 02:23:27,598 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-22 02:23:27,598 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 02:23:27,598 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 02:23:27,598 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 02:23:27,599 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-22 02:23:27,599 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-22 02:23:27,599 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 02:23:27,599 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 02:23:27,599 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-22 02:23:27,599 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-22 02:23:27,600 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-22 02:23:27,600 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 02:23:27,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 02:23:27,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 02:23:27,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 02:23:27,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 02:23:27,601 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 02:23:27,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 02:23:28,022 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 02:23:28,023 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-22 02:23:28,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:23:28 BoogieIcfgContainer [2021-02-22 02:23:28,026 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 02:23:28,029 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 02:23:28,029 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 02:23:28,033 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 02:23:28,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 02:23:27" (1/3) ... [2021-02-22 02:23:28,036 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10e1cf1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:23:28, skipping insertion in model container [2021-02-22 02:23:28,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:23:27" (2/3) ... [2021-02-22 02:23:28,037 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10e1cf1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:23:28, skipping insertion in model container [2021-02-22 02:23:28,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:23:28" (3/3) ... [2021-02-22 02:23:28,038 INFO L111 eAbstractionObserver]: Analyzing ICFG ddlm2013.i [2021-02-22 02:23:28,047 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 02:23:28,052 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 02:23:28,073 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 02:23:28,108 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 02:23:28,108 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 02:23:28,109 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 02:23:28,109 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 02:23:28,109 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 02:23:28,109 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 02:23:28,109 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 02:23:28,110 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 02:23:28,135 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states. [2021-02-22 02:23:28,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-22 02:23:28,147 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:23:28,148 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 02:23:28,149 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:23:28,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:23:28,158 INFO L82 PathProgramCache]: Analyzing trace with hash 938281063, now seen corresponding path program 1 times [2021-02-22 02:23:28,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:23:28,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [880410613] [2021-02-22 02:23:28,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:23:28,253 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:23:28,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:23:28,366 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:23:28,368 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:23:28,369 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:23:28,370 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:23:28,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:23:28,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:23:28,441 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:23:28,442 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:23:28,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:23:28,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [880410613] [2021-02-22 02:23:28,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:23:28,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-22 02:23:28,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822678716] [2021-02-22 02:23:28,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-22 02:23:28,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:23:28,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-22 02:23:28,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-22 02:23:28,478 INFO L87 Difference]: Start difference. First operand 52 states. Second operand 3 states. [2021-02-22 02:23:28,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:23:28,585 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2021-02-22 02:23:28,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-22 02:23:28,588 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2021-02-22 02:23:28,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:23:28,599 INFO L225 Difference]: With dead ends: 65 [2021-02-22 02:23:28,599 INFO L226 Difference]: Without dead ends: 44 [2021-02-22 02:23:28,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-22 02:23:28,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-02-22 02:23:28,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-02-22 02:23:28,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-02-22 02:23:28,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2021-02-22 02:23:28,659 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 29 [2021-02-22 02:23:28,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:23:28,660 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2021-02-22 02:23:28,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-22 02:23:28,660 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2021-02-22 02:23:28,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-22 02:23:28,661 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:23:28,662 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 02:23:28,662 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 02:23:28,662 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:23:28,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:23:28,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1407892642, now seen corresponding path program 1 times [2021-02-22 02:23:28,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:23:28,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [412304201] [2021-02-22 02:23:28,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:23:28,667 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:23:28,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:23:28,740 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:23:28,741 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:23:28,743 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:23:28,744 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:23:28,752 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:23:28,753 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:23:28,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:23:28,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:23:28,815 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:23:28,816 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:23:28,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:23:28,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [412304201] [2021-02-22 02:23:28,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:23:28,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-22 02:23:28,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541181784] [2021-02-22 02:23:28,821 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-22 02:23:28,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:23:28,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-22 02:23:28,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-22 02:23:28,823 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 4 states. [2021-02-22 02:23:29,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:23:29,170 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2021-02-22 02:23:29,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-22 02:23:29,171 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2021-02-22 02:23:29,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:23:29,176 INFO L225 Difference]: With dead ends: 64 [2021-02-22 02:23:29,177 INFO L226 Difference]: Without dead ends: 43 [2021-02-22 02:23:29,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-22 02:23:29,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-02-22 02:23:29,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-02-22 02:23:29,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-02-22 02:23:29,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2021-02-22 02:23:29,211 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 31 [2021-02-22 02:23:29,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:23:29,212 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2021-02-22 02:23:29,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-22 02:23:29,213 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2021-02-22 02:23:29,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-22 02:23:29,218 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:23:29,219 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 02:23:29,219 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-22 02:23:29,219 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:23:29,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:23:29,223 INFO L82 PathProgramCache]: Analyzing trace with hash 309043966, now seen corresponding path program 1 times [2021-02-22 02:23:29,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:23:29,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [624288404] [2021-02-22 02:23:29,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:23:29,230 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:23:29,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:23:29,406 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:23:29,408 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:23:29,409 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:23:29,410 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:23:29,424 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:23:29,426 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:23:29,434 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:23:29,435 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:23:29,440 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:23:29,441 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:23:29,458 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:23:29,459 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:23:29,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:23:29,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:23:29,498 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:23:29,498 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:23:29,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:23:29,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [624288404] [2021-02-22 02:23:29,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:23:29,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-22 02:23:29,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168403742] [2021-02-22 02:23:29,504 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-22 02:23:29,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:23:29,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-22 02:23:29,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-02-22 02:23:29,505 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 7 states. [2021-02-22 02:23:29,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:23:29,756 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2021-02-22 02:23:29,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-22 02:23:29,757 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2021-02-22 02:23:29,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:23:29,758 INFO L225 Difference]: With dead ends: 55 [2021-02-22 02:23:29,759 INFO L226 Difference]: Without dead ends: 48 [2021-02-22 02:23:29,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-02-22 02:23:29,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-02-22 02:23:29,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2021-02-22 02:23:29,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-02-22 02:23:29,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-02-22 02:23:29,772 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 31 [2021-02-22 02:23:29,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:23:29,773 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-02-22 02:23:29,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-22 02:23:29,774 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-02-22 02:23:29,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-22 02:23:29,775 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:23:29,776 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 02:23:29,776 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-22 02:23:29,776 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:23:29,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:23:29,777 INFO L82 PathProgramCache]: Analyzing trace with hash -441562392, now seen corresponding path program 1 times [2021-02-22 02:23:29,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:23:29,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1388134129] [2021-02-22 02:23:29,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:23:29,836 WARN L141 QuantifierPusher]: treesize reduction 2, result has 84.6 percent of original size [2021-02-22 02:23:29,862 WARN L147 QuantifierPusher]: treesize reduction 2, result has 84.6 percent of original size 11 [2021-02-22 02:23:29,869 WARN L141 QuantifierPusher]: treesize reduction 31, result has 8.8 percent of original size [2021-02-22 02:23:29,882 WARN L147 QuantifierPusher]: treesize reduction 31, result has 8.8 percent of original size 3 [2021-02-22 02:23:29,886 WARN L141 QuantifierPusher]: treesize reduction 2, result has 84.6 percent of original size [2021-02-22 02:23:29,889 WARN L147 QuantifierPusher]: treesize reduction 2, result has 84.6 percent of original size 11 [2021-02-22 02:23:29,892 WARN L141 QuantifierPusher]: treesize reduction 31, result has 8.8 percent of original size [2021-02-22 02:23:29,893 WARN L147 QuantifierPusher]: treesize reduction 31, result has 8.8 percent of original size 3 [2021-02-22 02:23:29,894 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:23:29,895 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-02-22 02:23:29,897 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:23:29,898 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-02-22 02:23:29,899 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:23:29,900 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:23:29,902 WARN L141 QuantifierPusher]: treesize reduction 15, result has 51.6 percent of original size [2021-02-22 02:23:29,906 WARN L147 QuantifierPusher]: treesize reduction 15, result has 51.6 percent of original size 16 [2021-02-22 02:23:29,910 WARN L141 QuantifierPusher]: treesize reduction 2, result has 84.6 percent of original size [2021-02-22 02:23:29,912 WARN L147 QuantifierPusher]: treesize reduction 2, result has 84.6 percent of original size 11 [2021-02-22 02:23:29,915 WARN L141 QuantifierPusher]: treesize reduction 31, result has 8.8 percent of original size [2021-02-22 02:23:29,916 WARN L147 QuantifierPusher]: treesize reduction 31, result has 8.8 percent of original size 3 [2021-02-22 02:23:29,916 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:23:29,918 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-02-22 02:23:29,919 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:23:29,920 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-02-22 02:23:29,921 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:23:29,922 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:23:29,925 WARN L141 QuantifierPusher]: treesize reduction 17, result has 45.2 percent of original size [2021-02-22 02:23:29,926 WARN L147 QuantifierPusher]: treesize reduction 17, result has 45.2 percent of original size 14 [2021-02-22 02:23:29,927 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:23:29,928 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-02-22 02:23:29,930 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:23:29,931 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-02-22 02:23:29,933 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:23:29,933 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:23:29,936 WARN L141 QuantifierPusher]: treesize reduction 15, result has 51.6 percent of original size [2021-02-22 02:23:29,938 WARN L147 QuantifierPusher]: treesize reduction 15, result has 51.6 percent of original size 16 [2021-02-22 02:23:29,942 WARN L141 QuantifierPusher]: treesize reduction 2, result has 84.6 percent of original size [2021-02-22 02:23:29,945 WARN L147 QuantifierPusher]: treesize reduction 2, result has 84.6 percent of original size 11 [2021-02-22 02:23:29,949 WARN L141 QuantifierPusher]: treesize reduction 31, result has 8.8 percent of original size [2021-02-22 02:23:29,950 WARN L147 QuantifierPusher]: treesize reduction 31, result has 8.8 percent of original size 3 [2021-02-22 02:23:29,951 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:23:29,952 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-22 02:23:29,953 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:23:29,954 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-22 02:23:29,956 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:23:29,956 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:23:29,960 WARN L141 QuantifierPusher]: treesize reduction 9, result has 76.3 percent of original size [2021-02-22 02:23:29,968 WARN L147 QuantifierPusher]: treesize reduction 9, result has 76.3 percent of original size 29 [2021-02-22 02:23:29,969 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-22 02:23:29,987 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-02-22 02:23:29,987 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-22 02:23:29,997 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-22 02:23:30,018 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-02-22 02:23:30,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.02 02:23:30 BoogieIcfgContainer [2021-02-22 02:23:30,019 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-22 02:23:30,021 INFO L168 Benchmark]: Toolchain (without parser) took 2928.95 ms. Allocated memory was 151.0 MB in the beginning and 186.6 MB in the end (delta: 35.7 MB). Free memory was 126.8 MB in the beginning and 156.5 MB in the end (delta: -29.7 MB). Peak memory consumption was 7.1 MB. Max. memory is 8.0 GB. [2021-02-22 02:23:30,022 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory was 137.2 MB in the beginning and 137.0 MB in the end (delta: 105.7 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 02:23:30,028 INFO L168 Benchmark]: CACSL2BoogieTranslator took 343.54 ms. Allocated memory is still 151.0 MB. Free memory was 125.6 MB in the beginning and 115.9 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-22 02:23:30,029 INFO L168 Benchmark]: Boogie Preprocessor took 38.72 ms. Allocated memory is still 151.0 MB. Free memory was 115.9 MB in the beginning and 114.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-22 02:23:30,030 INFO L168 Benchmark]: RCFGBuilder took 530.61 ms. Allocated memory is still 151.0 MB. Free memory was 114.4 MB in the beginning and 125.0 MB in the end (delta: -10.6 MB). Peak memory consumption was 11.2 MB. Max. memory is 8.0 GB. [2021-02-22 02:23:30,035 INFO L168 Benchmark]: TraceAbstraction took 1990.30 ms. Allocated memory was 151.0 MB in the beginning and 186.6 MB in the end (delta: 35.7 MB). Free memory was 124.3 MB in the beginning and 156.5 MB in the end (delta: -32.2 MB). Peak memory consumption was 4.3 MB. Max. memory is 8.0 GB. [2021-02-22 02:23:30,045 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory was 137.2 MB in the beginning and 137.0 MB in the end (delta: 105.7 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 343.54 ms. Allocated memory is still 151.0 MB. Free memory was 125.6 MB in the beginning and 115.9 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.72 ms. Allocated memory is still 151.0 MB. Free memory was 115.9 MB in the beginning and 114.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 530.61 ms. Allocated memory is still 151.0 MB. Free memory was 114.4 MB in the beginning and 125.0 MB in the end (delta: -10.6 MB). Peak memory consumption was 11.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1990.30 ms. Allocated memory was 151.0 MB in the beginning and 186.6 MB in the end (delta: 35.7 MB). Free memory was 124.3 MB in the beginning and 156.5 MB in the end (delta: -32.2 MB). Peak memory consumption was 4.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L25] unsigned int i,j,a,b; [L26] int flag = __VERIFIER_nondet_int(); [L27] a = 0 [L28] b = 0 [L29] j = 1 [L30] COND TRUE \read(flag) [L31] i = 0 [L35] COND TRUE __VERIFIER_nondet_int() [L36] a++ [L37] b += (j - i) [L38] i += 2 [L39] COND TRUE i%2 == 0 [L40] j += 2 [L35] COND FALSE !(__VERIFIER_nondet_int()) [L45] COND TRUE \read(flag) [L46] CALL __VERIFIER_assert(a == b) [L18] COND TRUE !(cond) [L19] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 62 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 1.8s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 141 SDtfs, 158 SDslu, 57 SDs, 0 SdLazy, 147 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 3 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...