/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/lcm2_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-1a84f73 [2021-05-01 08:24:31,657 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-01 08:24:31,660 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-01 08:24:31,700 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-01 08:24:31,725 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-01 08:24:31,727 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-01 08:24:31,729 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-01 08:24:31,730 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-01 08:24:31,734 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-01 08:24:31,735 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-01 08:24:31,738 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-01 08:24:31,746 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-01 08:24:31,747 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-01 08:24:31,749 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-01 08:24:31,771 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-01 08:24:31,773 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-01 08:24:31,776 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-01 08:24:31,779 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-01 08:24:31,780 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-01 08:24:31,782 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-01 08:24:31,783 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-01 08:24:31,784 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-01 08:24:31,784 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-01 08:24:31,786 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-01 08:24:31,786 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-01 08:24:31,786 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-01 08:24:31,787 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-01 08:24:31,788 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-01 08:24:31,789 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-01 08:24:31,804 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-01 08:24:31,804 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-01 08:24:31,807 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-01 08:24:31,808 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-01 08:24:31,808 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-01 08:24:31,808 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-01 08:24:31,808 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-01 08:24:31,808 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-01 08:24:31,809 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-01 08:24:31,809 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-01 08:24:31,809 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-01 08:24:31,810 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-01 08:24:31,810 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-01 08:24:31,810 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-01 08:24:31,810 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-01 08:24:31,810 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-01 08:24:31,810 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-01 08:24:31,810 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-01 08:24:31,810 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-01 08:24:31,811 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-01 08:24:31,811 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-01 08:24:31,811 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-01 08:24:31,811 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-01 08:24:31,811 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-01 08:24:32,076 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-01 08:24:32,102 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-01 08:24:32,104 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-01 08:24:32,105 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-01 08:24:32,106 INFO L275 PluginConnector]: CDTParser initialized [2021-05-01 08:24:32,106 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/lcm2_valuebound1.c [2021-05-01 08:24:32,159 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/761bf95a4/99bb2b8cd7334376b94cc5b18adff898/FLAG81ecbb93a [2021-05-01 08:24:32,486 INFO L306 CDTParser]: Found 1 translation units. [2021-05-01 08:24:32,486 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm2_valuebound1.c [2021-05-01 08:24:32,494 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/761bf95a4/99bb2b8cd7334376b94cc5b18adff898/FLAG81ecbb93a [2021-05-01 08:24:32,901 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/761bf95a4/99bb2b8cd7334376b94cc5b18adff898 [2021-05-01 08:24:32,908 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-01 08:24:32,910 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-01 08:24:32,912 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-01 08:24:32,912 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-01 08:24:32,915 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-01 08:24:32,916 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:24:32" (1/1) ... [2021-05-01 08:24:32,918 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@224a5049 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:32, skipping insertion in model container [2021-05-01 08:24:32,918 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:24:32" (1/1) ... [2021-05-01 08:24:32,924 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-01 08:24:32,940 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-01 08:24:33,039 WARN L224 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/lcm2_valuebound1.c[545,558] [2021-05-01 08:24:33,051 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:24:33,058 INFO L203 MainTranslator]: Completed pre-run [2021-05-01 08:24:33,117 WARN L224 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/lcm2_valuebound1.c[545,558] [2021-05-01 08:24:33,131 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:24:33,144 INFO L208 MainTranslator]: Completed translation [2021-05-01 08:24:33,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:33 WrapperNode [2021-05-01 08:24:33,145 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-01 08:24:33,146 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-01 08:24:33,146 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-01 08:24:33,147 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-01 08:24:33,155 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:33" (1/1) ... [2021-05-01 08:24:33,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:33" (1/1) ... [2021-05-01 08:24:33,172 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:33" (1/1) ... [2021-05-01 08:24:33,176 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:33" (1/1) ... [2021-05-01 08:24:33,186 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:33" (1/1) ... [2021-05-01 08:24:33,189 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:33" (1/1) ... [2021-05-01 08:24:33,190 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:33" (1/1) ... [2021-05-01 08:24:33,192 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-01 08:24:33,193 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-01 08:24:33,193 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-01 08:24:33,193 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-01 08:24:33,194 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:33" (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 [2021-05-01 08:24:33,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-01 08:24:33,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-01 08:24:33,279 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-01 08:24:33,280 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-01 08:24:33,280 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-01 08:24:33,280 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-01 08:24:33,280 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-01 08:24:33,280 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-01 08:24:33,281 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-01 08:24:33,281 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-01 08:24:33,281 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-01 08:24:33,281 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-01 08:24:33,281 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-01 08:24:33,282 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-01 08:24:33,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-01 08:24:33,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-01 08:24:33,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-01 08:24:33,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-01 08:24:33,283 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-01 08:24:33,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-01 08:24:33,558 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-01 08:24:33,559 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-01 08:24:33,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:24:33 BoogieIcfgContainer [2021-05-01 08:24:33,560 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-01 08:24:33,577 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-01 08:24:33,578 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-01 08:24:33,580 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-01 08:24:33,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.05 08:24:32" (1/3) ... [2021-05-01 08:24:33,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e66fb8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:24:33, skipping insertion in model container [2021-05-01 08:24:33,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:33" (2/3) ... [2021-05-01 08:24:33,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e66fb8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:24:33, skipping insertion in model container [2021-05-01 08:24:33,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:24:33" (3/3) ... [2021-05-01 08:24:33,583 INFO L111 eAbstractionObserver]: Analyzing ICFG lcm2_valuebound1.c [2021-05-01 08:24:33,587 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-01 08:24:33,590 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-01 08:24:33,620 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-01 08:24:33,653 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-01 08:24:33,654 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-01 08:24:33,654 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-01 08:24:33,654 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-01 08:24:33,654 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-01 08:24:33,654 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-01 08:24:33,654 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-01 08:24:33,654 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-01 08:24:33,689 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-01 08:24:33,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-01 08:24:33,696 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:24:33,696 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-05-01 08:24:33,697 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:24:33,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:24:33,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1830914611, now seen corresponding path program 1 times [2021-05-01 08:24:33,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:24:33,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [160758332] [2021-05-01 08:24:33,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:24:33,782 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:24:33,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:24:33,856 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:33,857 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:33,858 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:33,858 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:33,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 08:24:33,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:24:33,899 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:33,900 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:33,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-01 08:24:33,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:24:33,905 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:33,906 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:33,907 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:33,907 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:33,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-01 08:24:33,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:24:33,911 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:33,911 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:33,912 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:33,912 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:33,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-01 08:24:33,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:24:33,917 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:33,917 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:33,918 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:33,918 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:33,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-01 08:24:33,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:24:33,922 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:33,923 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:33,923 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:33,924 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:33,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-05-01 08:24:33,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:24:33,928 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:33,928 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:33,929 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:33,929 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:33,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-05-01 08:24:33,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:24:33,933 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:33,934 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:33,934 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:33,935 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:33,936 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-01 08:24:33,937 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 08:24:33,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [160758332] [2021-05-01 08:24:33,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [160758332] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 08:24:33,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 08:24:33,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-01 08:24:33,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603824586] [2021-05-01 08:24:33,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-01 08:24:33,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 08:24:33,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-01 08:24:33,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 08:24:33,955 INFO L87 Difference]: Start difference. First operand has 34 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-01 08:24:34,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 08:24:34,086 INFO L93 Difference]: Finished difference Result 61 states and 90 transitions. [2021-05-01 08:24:34,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-01 08:24:34,089 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2021-05-01 08:24:34,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 08:24:34,097 INFO L225 Difference]: With dead ends: 61 [2021-05-01 08:24:34,098 INFO L226 Difference]: Without dead ends: 29 [2021-05-01 08:24:34,102 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 08:24:34,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-01 08:24:34,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-01 08:24:34,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-01 08:24:34,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2021-05-01 08:24:34,137 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 43 [2021-05-01 08:24:34,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 08:24:34,137 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2021-05-01 08:24:34,137 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-01 08:24:34,137 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2021-05-01 08:24:34,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-01 08:24:34,139 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:24:34,139 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-05-01 08:24:34,140 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-01 08:24:34,140 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:24:34,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:24:34,141 INFO L82 PathProgramCache]: Analyzing trace with hash 206107499, now seen corresponding path program 1 times [2021-05-01 08:24:34,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:24:34,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958879495] [2021-05-01 08:24:34,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:24:34,143 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:24:34,161 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-01 08:24:34,161 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-05-01 08:24:34,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-01 08:24:34,174 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-01 08:24:34,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 08:24:34 BoogieIcfgContainer [2021-05-01 08:24:34,175 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-01 08:24:34,176 INFO L168 Benchmark]: Toolchain (without parser) took 1265.82 ms. Allocated memory is still 194.0 MB. Free memory was 160.0 MB in the beginning and 165.3 MB in the end (delta: -5.3 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 08:24:34,176 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 194.0 MB. Free memory is still 175.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 08:24:34,177 INFO L168 Benchmark]: CACSL2BoogieTranslator took 232.73 ms. Allocated memory is still 194.0 MB. Free memory was 159.8 MB in the beginning and 177.9 MB in the end (delta: -18.1 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. [2021-05-01 08:24:34,177 INFO L168 Benchmark]: Boogie Preprocessor took 46.15 ms. Allocated memory is still 194.0 MB. Free memory was 177.4 MB in the beginning and 175.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-01 08:24:34,178 INFO L168 Benchmark]: RCFGBuilder took 367.19 ms. Allocated memory is still 194.0 MB. Free memory was 175.8 MB in the beginning and 160.6 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-01 08:24:34,178 INFO L168 Benchmark]: TraceAbstraction took 597.61 ms. Allocated memory is still 194.0 MB. Free memory was 160.0 MB in the beginning and 165.3 MB in the end (delta: -5.2 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 08:24:34,180 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 194.0 MB. Free memory is still 175.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 232.73 ms. Allocated memory is still 194.0 MB. Free memory was 159.8 MB in the beginning and 177.9 MB in the end (delta: -18.1 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 46.15 ms. Allocated memory is still 194.0 MB. Free memory was 177.4 MB in the beginning and 175.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 367.19 ms. Allocated memory is still 194.0 MB. Free memory was 175.8 MB in the beginning and 160.6 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 597.61 ms. Allocated memory is still 194.0 MB. Free memory was 160.0 MB in the beginning and 165.3 MB in the end (delta: -5.2 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 14]: 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: [L20] unsigned a, b; [L21] unsigned x, y, u, v; [L22] a = __VERIFIER_nondet_unsigned_int() [L23] CALL assume_abort_if_not(a>=0 && a<=1) [L9] COND FALSE !(!cond) [L23] RET assume_abort_if_not(a>=0 && a<=1) [L24] b = __VERIFIER_nondet_unsigned_int() [L25] CALL assume_abort_if_not(b>=0 && b<=1) [L9] COND FALSE !(!cond) [L25] RET assume_abort_if_not(b>=0 && b<=1) [L26] CALL assume_abort_if_not(a >= 1) [L9] COND FALSE !(!cond) [L26] RET assume_abort_if_not(a >= 1) [L27] CALL assume_abort_if_not(b >= 1) [L9] COND FALSE !(!cond) [L27] RET assume_abort_if_not(b >= 1) [L29] CALL assume_abort_if_not(a <= 65535) [L9] COND FALSE !(!cond) [L29] RET assume_abort_if_not(a <= 65535) [L30] CALL assume_abort_if_not(b <= 65535) [L9] COND FALSE !(!cond) [L30] RET assume_abort_if_not(b <= 65535) [L32] x = a [L33] y = b [L34] u = b [L35] v = a [L37] COND TRUE 1 [L38] CALL __VERIFIER_assert(x*u + y*v == 2*a*b) [L12] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 513.4ms, OverallIterations: 2, TraceHistogramMax: 6, EmptinessCheckTime: 18.3ms, AutomataDifference: 158.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 25.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 32 SDtfs, 18 SDslu, 3 SDs, 0 SdLazy, 11 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 74.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=0, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 24.0ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 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...