/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/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-a47f07a [2021-04-16 08:08:49,780 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-16 08:08:49,783 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-16 08:08:49,825 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-04-16 08:08:49,826 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-04-16 08:08:49,830 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-04-16 08:08:49,833 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-04-16 08:08:49,839 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-04-16 08:08:49,842 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-04-16 08:08:49,847 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-04-16 08:08:49,848 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-04-16 08:08:49,849 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-04-16 08:08:49,850 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-04-16 08:08:49,852 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-04-16 08:08:49,854 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-04-16 08:08:49,855 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-04-16 08:08:49,858 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-04-16 08:08:49,859 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-04-16 08:08:49,862 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-04-16 08:08:49,870 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-04-16 08:08:49,872 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-04-16 08:08:49,874 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-04-16 08:08:49,875 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-04-16 08:08:49,877 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-04-16 08:08:49,885 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-04-16 08:08:49,885 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-04-16 08:08:49,885 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-04-16 08:08:49,888 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-04-16 08:08:49,888 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-04-16 08:08:49,891 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-04-16 08:08:49,892 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-04-16 08:08:49,893 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-04-16 08:08:49,894 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-04-16 08:08:49,895 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-04-16 08:08:49,896 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-04-16 08:08:49,896 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-04-16 08:08:49,897 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-04-16 08:08:49,897 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-04-16 08:08:49,897 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-04-16 08:08:49,898 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-04-16 08:08:49,898 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-04-16 08:08:49,903 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-04-16 08:08:49,921 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-16 08:08:49,921 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-16 08:08:49,925 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-16 08:08:49,925 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-16 08:08:49,925 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-16 08:08:49,925 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-16 08:08:49,925 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-16 08:08:49,926 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-16 08:08:49,926 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-16 08:08:49,926 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-16 08:08:49,927 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-16 08:08:49,927 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-16 08:08:49,927 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-16 08:08:49,927 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-16 08:08:49,927 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-16 08:08:49,928 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-16 08:08:49,928 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-16 08:08:49,928 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-16 08:08:49,928 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-16 08:08:49,928 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-16 08:08:49,928 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-04-16 08:08:49,929 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-16 08:08:49,929 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-04-16 08:08:49,929 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-16 08:08:50,310 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-16 08:08:50,331 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-16 08:08:50,333 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-16 08:08:50,334 INFO L271 PluginConnector]: Initializing CDTParser... [2021-04-16 08:08:50,335 INFO L275 PluginConnector]: CDTParser initialized [2021-04-16 08:08:50,336 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound2.c [2021-04-16 08:08:50,417 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e064b3ee0/1b5cd9a94ca24f798b3da7c8942e1ee8/FLAG4bafabf5e [2021-04-16 08:08:50,918 INFO L306 CDTParser]: Found 1 translation units. [2021-04-16 08:08:50,919 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound2.c [2021-04-16 08:08:50,926 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e064b3ee0/1b5cd9a94ca24f798b3da7c8942e1ee8/FLAG4bafabf5e [2021-04-16 08:08:51,392 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e064b3ee0/1b5cd9a94ca24f798b3da7c8942e1ee8 [2021-04-16 08:08:51,394 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-16 08:08:51,397 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-16 08:08:51,401 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-04-16 08:08:51,401 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-04-16 08:08:51,405 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-04-16 08:08:51,405 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.04 08:08:51" (1/1) ... [2021-04-16 08:08:51,406 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@607a1b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:08:51, skipping insertion in model container [2021-04-16 08:08:51,407 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.04 08:08:51" (1/1) ... [2021-04-16 08:08:51,414 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-04-16 08:08:51,437 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-04-16 08:08:51,539 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound2.c[545,558] [2021-04-16 08:08:51,553 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-16 08:08:51,564 INFO L203 MainTranslator]: Completed pre-run [2021-04-16 08:08:51,575 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound2.c[545,558] [2021-04-16 08:08:51,582 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-16 08:08:51,594 INFO L208 MainTranslator]: Completed translation [2021-04-16 08:08:51,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:08:51 WrapperNode [2021-04-16 08:08:51,595 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-04-16 08:08:51,596 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-16 08:08:51,597 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-16 08:08:51,597 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-16 08:08:51,630 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:08:51" (1/1) ... [2021-04-16 08:08:51,631 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:08:51" (1/1) ... [2021-04-16 08:08:51,667 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:08:51" (1/1) ... [2021-04-16 08:08:51,668 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:08:51" (1/1) ... [2021-04-16 08:08:51,673 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:08:51" (1/1) ... [2021-04-16 08:08:51,691 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:08:51" (1/1) ... [2021-04-16 08:08:51,692 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:08:51" (1/1) ... [2021-04-16 08:08:51,694 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-16 08:08:51,695 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-16 08:08:51,695 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-16 08:08:51,695 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-16 08:08:51,696 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:08:51" (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 [2021-04-16 08:08:51,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-04-16 08:08:51,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-16 08:08:51,776 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-04-16 08:08:51,776 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-04-16 08:08:51,776 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-04-16 08:08:51,776 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-04-16 08:08:51,776 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-04-16 08:08:51,777 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-04-16 08:08:51,777 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-04-16 08:08:51,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-04-16 08:08:51,778 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-04-16 08:08:51,778 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-04-16 08:08:51,778 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-04-16 08:08:51,779 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-04-16 08:08:51,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-04-16 08:08:51,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-04-16 08:08:51,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-16 08:08:51,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-04-16 08:08:51,780 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-04-16 08:08:51,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-04-16 08:08:52,108 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-16 08:08:52,108 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-04-16 08:08:52,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.04 08:08:52 BoogieIcfgContainer [2021-04-16 08:08:52,110 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-16 08:08:52,111 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-16 08:08:52,112 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-16 08:08:52,114 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-16 08:08:52,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.04 08:08:51" (1/3) ... [2021-04-16 08:08:52,115 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10ed09ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.04 08:08:52, skipping insertion in model container [2021-04-16 08:08:52,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:08:51" (2/3) ... [2021-04-16 08:08:52,115 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10ed09ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.04 08:08:52, skipping insertion in model container [2021-04-16 08:08:52,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.04 08:08:52" (3/3) ... [2021-04-16 08:08:52,117 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_valuebound2.c [2021-04-16 08:08:52,122 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-04-16 08:08:52,125 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-16 08:08:52,141 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-04-16 08:08:52,160 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-16 08:08:52,161 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-16 08:08:52,161 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-04-16 08:08:52,161 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-16 08:08:52,161 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-16 08:08:52,161 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-16 08:08:52,161 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-16 08:08:52,161 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-16 08:08:52,176 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-04-16 08:08:52,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-16 08:08:52,184 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 08:08:52,185 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 08:08:52,186 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 08:08:52,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 08:08:52,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1784424332, now seen corresponding path program 1 times [2021-04-16 08:08:52,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 08:08:52,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2091065646] [2021-04-16 08:08:52,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 08:08:52,265 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 08:08:52,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:08:52,413 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:52,415 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:52,416 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:52,416 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:52,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-16 08:08:52,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:08:52,534 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:52,535 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:52,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-04-16 08:08:52,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:08:52,545 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:52,546 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:52,547 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:52,548 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:52,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-04-16 08:08:52,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:08:52,565 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:52,566 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:52,567 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:52,568 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:52,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-04-16 08:08:52,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:08:52,576 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:52,578 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:52,579 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:52,580 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:52,581 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-04-16 08:08:52,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2091065646] [2021-04-16 08:08:52,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 08:08:52,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-16 08:08:52,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879886570] [2021-04-16 08:08:52,596 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-16 08:08:52,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-04-16 08:08:52,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-16 08:08:52,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-16 08:08:52,611 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-04-16 08:08:52,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 08:08:52,848 INFO L93 Difference]: Finished difference Result 69 states and 110 transitions. [2021-04-16 08:08:52,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-16 08:08:52,850 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-04-16 08:08:52,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 08:08:52,857 INFO L225 Difference]: With dead ends: 69 [2021-04-16 08:08:52,858 INFO L226 Difference]: Without dead ends: 33 [2021-04-16 08:08:52,861 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 79.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-16 08:08:52,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-04-16 08:08:52,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-04-16 08:08:52,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-04-16 08:08:52,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-04-16 08:08:52,905 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2021-04-16 08:08:52,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 08:08:52,906 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-04-16 08:08:52,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-04-16 08:08:52,906 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-04-16 08:08:52,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-16 08:08:52,908 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 08:08:52,908 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 08:08:52,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-16 08:08:52,909 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 08:08:52,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 08:08:52,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1361835634, now seen corresponding path program 1 times [2021-04-16 08:08:52,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 08:08:52,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1884227798] [2021-04-16 08:08:52,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 08:08:52,913 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 08:08:52,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:08:52,989 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:52,990 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:52,991 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:52,992 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 08:08:52,996 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:52,997 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-04-16 08:08:53,002 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:53,002 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-04-16 08:08:53,008 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:53,009 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:53,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-16 08:08:53,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:08:53,049 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:53,050 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:53,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-04-16 08:08:53,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:08:53,060 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:53,060 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:53,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-04-16 08:08:53,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:08:53,069 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:53,070 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:53,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-04-16 08:08:53,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:08:53,084 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:53,084 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:53,085 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-04-16 08:08:53,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1884227798] [2021-04-16 08:08:53,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 08:08:53,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-16 08:08:53,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836740091] [2021-04-16 08:08:53,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-16 08:08:53,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-04-16 08:08:53,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-16 08:08:53,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-04-16 08:08:53,088 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-04-16 08:08:53,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 08:08:53,581 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2021-04-16 08:08:53,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-16 08:08:53,582 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2021-04-16 08:08:53,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 08:08:53,586 INFO L225 Difference]: With dead ends: 46 [2021-04-16 08:08:53,587 INFO L226 Difference]: Without dead ends: 44 [2021-04-16 08:08:53,590 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 185.7ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-04-16 08:08:53,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-04-16 08:08:53,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-04-16 08:08:53,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-04-16 08:08:53,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-04-16 08:08:53,609 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2021-04-16 08:08:53,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 08:08:53,610 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-04-16 08:08:53,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-04-16 08:08:53,610 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-04-16 08:08:53,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-16 08:08:53,611 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 08:08:53,611 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 08:08:53,611 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-04-16 08:08:53,611 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 08:08:53,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 08:08:53,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1382067636, now seen corresponding path program 1 times [2021-04-16 08:08:53,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 08:08:53,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415526154] [2021-04-16 08:08:53,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 08:08:53,615 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 08:08:53,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:08:53,716 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:53,716 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:53,723 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:53,724 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-04-16 08:08:53,741 INFO L142 QuantifierPusher]: treesize reduction 19, result has 83.2 percent of original size [2021-04-16 08:08:53,745 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94 [2021-04-16 08:08:53,793 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:53,793 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-04-16 08:08:53,799 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:53,800 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-04-16 08:08:53,806 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:53,807 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:53,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-16 08:08:53,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:08:53,857 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:53,857 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:53,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-04-16 08:08:53,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:08:53,862 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:53,863 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:53,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-04-16 08:08:53,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:08:53,867 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:53,868 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:53,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-04-16 08:08:53,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:08:53,872 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:53,872 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:53,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-04-16 08:08:53,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:08:53,880 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:53,881 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:53,881 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-04-16 08:08:53,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415526154] [2021-04-16 08:08:53,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 08:08:53,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-16 08:08:53,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100912373] [2021-04-16 08:08:53,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-16 08:08:53,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-04-16 08:08:53,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-16 08:08:53,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-04-16 08:08:53,883 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-04-16 08:08:54,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 08:08:54,271 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2021-04-16 08:08:54,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-16 08:08:54,272 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-04-16 08:08:54,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 08:08:54,273 INFO L225 Difference]: With dead ends: 50 [2021-04-16 08:08:54,273 INFO L226 Difference]: Without dead ends: 48 [2021-04-16 08:08:54,274 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 208.7ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-04-16 08:08:54,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-04-16 08:08:54,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2021-04-16 08:08:54,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-04-16 08:08:54,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-04-16 08:08:54,304 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2021-04-16 08:08:54,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 08:08:54,305 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-04-16 08:08:54,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-04-16 08:08:54,305 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-04-16 08:08:54,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-04-16 08:08:54,306 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 08:08:54,306 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 08:08:54,306 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-04-16 08:08:54,307 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 08:08:54,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 08:08:54,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1455208590, now seen corresponding path program 1 times [2021-04-16 08:08:54,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 08:08:54,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [606872345] [2021-04-16 08:08:54,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 08:08:54,310 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 08:08:54,328 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-04-16 08:08:54,328 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-04-16 08:08:54,333 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-04-16 08:08:54,344 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-04-16 08:08:54,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.04 08:08:54 BoogieIcfgContainer [2021-04-16 08:08:54,344 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-16 08:08:54,345 INFO L168 Benchmark]: Toolchain (without parser) took 2948.02 ms. Allocated memory is still 187.7 MB. Free memory was 152.8 MB in the beginning and 72.4 MB in the end (delta: 80.5 MB). Peak memory consumption was 81.1 MB. Max. memory is 8.0 GB. [2021-04-16 08:08:54,346 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 187.7 MB. Free memory was 170.4 MB in the beginning and 170.2 MB in the end (delta: 147.8 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-04-16 08:08:54,346 INFO L168 Benchmark]: CACSL2BoogieTranslator took 194.50 ms. Allocated memory is still 187.7 MB. Free memory was 152.7 MB in the beginning and 142.7 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-04-16 08:08:54,347 INFO L168 Benchmark]: Boogie Preprocessor took 97.84 ms. Allocated memory is still 187.7 MB. Free memory was 142.7 MB in the beginning and 171.4 MB in the end (delta: -28.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. [2021-04-16 08:08:54,348 INFO L168 Benchmark]: RCFGBuilder took 414.71 ms. Allocated memory is still 187.7 MB. Free memory was 170.9 MB in the beginning and 155.6 MB in the end (delta: 15.2 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-04-16 08:08:54,348 INFO L168 Benchmark]: TraceAbstraction took 2233.04 ms. Allocated memory is still 187.7 MB. Free memory was 155.1 MB in the beginning and 72.4 MB in the end (delta: 82.8 MB). Peak memory consumption was 84.3 MB. Max. memory is 8.0 GB. [2021-04-16 08:08:54,350 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 187.7 MB. Free memory was 170.4 MB in the beginning and 170.2 MB in the end (delta: 147.8 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 194.50 ms. Allocated memory is still 187.7 MB. Free memory was 152.7 MB in the beginning and 142.7 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 97.84 ms. Allocated memory is still 187.7 MB. Free memory was 142.7 MB in the beginning and 171.4 MB in the end (delta: -28.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. * RCFGBuilder took 414.71 ms. Allocated memory is still 187.7 MB. Free memory was 170.9 MB in the beginning and 155.6 MB in the end (delta: 15.2 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2233.04 ms. Allocated memory is still 187.7 MB. Free memory was 155.1 MB in the beginning and 72.4 MB in the end (delta: 82.8 MB). Peak memory consumption was 84.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 17]: 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: [L23] unsigned int A, B; [L24] unsigned int r, d, p, q; [L25] A = __VERIFIER_nondet_unsigned_int() [L26] CALL assume_abort_if_not(A>=0 && A<=2) [L12] COND FALSE !(!cond) [L26] RET assume_abort_if_not(A>=0 && A<=2) [L27] B = __VERIFIER_nondet_unsigned_int() [L28] CALL assume_abort_if_not(B>=0 && B<=2) [L12] COND FALSE !(!cond) [L28] RET assume_abort_if_not(B>=0 && B<=2) [L29] CALL assume_abort_if_not(B >= 1) [L12] COND FALSE !(!cond) [L29] RET assume_abort_if_not(B >= 1) [L31] r = A [L32] d = B [L33] p = 1 [L34] q = 0 [L36] COND TRUE 1 [L37] CALL __VERIFIER_assert(q == 0) [L15] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(q == 0) [L38] CALL __VERIFIER_assert(r == A) [L15] COND FALSE !(!(cond)) [L38] RET __VERIFIER_assert(r == A) [L39] CALL __VERIFIER_assert(d == B * p) [L15] COND TRUE !(cond) [L17] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 2175.9ms, OverallIterations: 4, TraceHistogramMax: 3, EmptinessCheckTime: 14.8ms, AutomataDifference: 1155.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 97 SDtfs, 92 SDslu, 77 SDs, 0 SdLazy, 233 SolverSat, 68 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 540.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 474.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=3, InterpolantAutomatonStates: 17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 79.7ms AutomataMinimizationTime, 3 MinimizatonAttempts, 14 StatesRemovedByMinimization, 2 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...