/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_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-1a84f73 [2021-05-01 08:24:35,291 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-01 08:24:35,294 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-01 08:24:35,325 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-01 08:24:35,340 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-01 08:24:35,341 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-01 08:24:35,342 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-01 08:24:35,343 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-01 08:24:35,346 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-01 08:24:35,346 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-01 08:24:35,349 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-01 08:24:35,354 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-01 08:24:35,355 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-01 08:24:35,356 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-01 08:24:35,356 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-01 08:24:35,358 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-01 08:24:35,362 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-01 08:24:35,365 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-01 08:24:35,365 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-01 08:24:35,366 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-01 08:24:35,367 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-01 08:24:35,367 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-01 08:24:35,368 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-01 08:24:35,368 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-01 08:24:35,368 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-01 08:24:35,368 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-01 08:24:35,369 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-01 08:24:35,369 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-01 08:24:35,370 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 08:24:35,383 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-01 08:24:35,384 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-01 08:24:35,386 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-01 08:24:35,386 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-01 08:24:35,386 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-01 08:24:35,386 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-01 08:24:35,386 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-01 08:24:35,386 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-01 08:24:35,386 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-01 08:24:35,387 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-01 08:24:35,387 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-01 08:24:35,387 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-01 08:24:35,387 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-01 08:24:35,388 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-01 08:24:35,388 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-01 08:24:35,388 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-01 08:24:35,388 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-01 08:24:35,388 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-01 08:24:35,388 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-01 08:24:35,388 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-01 08:24:35,388 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-01 08:24:35,388 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-01 08:24:35,388 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-01 08:24:35,389 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-01 08:24:35,686 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-01 08:24:35,700 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-01 08:24:35,702 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-01 08:24:35,702 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-01 08:24:35,706 INFO L275 PluginConnector]: CDTParser initialized [2021-05-01 08:24:35,707 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/lcm2_valuebound20.c [2021-05-01 08:24:35,756 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/297ec2ed5/58779efdbfa5482ba80238611150bc8d/FLAG4f6f2a1e9 [2021-05-01 08:24:36,209 INFO L306 CDTParser]: Found 1 translation units. [2021-05-01 08:24:36,209 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm2_valuebound20.c [2021-05-01 08:24:36,215 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/297ec2ed5/58779efdbfa5482ba80238611150bc8d/FLAG4f6f2a1e9 [2021-05-01 08:24:36,230 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/297ec2ed5/58779efdbfa5482ba80238611150bc8d [2021-05-01 08:24:36,232 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-01 08:24:36,233 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-01 08:24:36,235 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-01 08:24:36,235 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-01 08:24:36,238 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-01 08:24:36,239 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:24:36" (1/1) ... [2021-05-01 08:24:36,239 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35266f55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:36, skipping insertion in model container [2021-05-01 08:24:36,240 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:24:36" (1/1) ... [2021-05-01 08:24:36,245 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-01 08:24:36,256 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-01 08:24:36,341 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_valuebound20.c[545,558] [2021-05-01 08:24:36,350 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:24:36,356 INFO L203 MainTranslator]: Completed pre-run [2021-05-01 08:24:36,375 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_valuebound20.c[545,558] [2021-05-01 08:24:36,379 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:24:36,410 INFO L208 MainTranslator]: Completed translation [2021-05-01 08:24:36,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:36 WrapperNode [2021-05-01 08:24:36,410 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-01 08:24:36,411 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-01 08:24:36,411 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-01 08:24:36,412 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-01 08:24:36,419 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:36" (1/1) ... [2021-05-01 08:24:36,419 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:36" (1/1) ... [2021-05-01 08:24:36,433 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:36" (1/1) ... [2021-05-01 08:24:36,433 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:36" (1/1) ... [2021-05-01 08:24:36,443 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:36" (1/1) ... [2021-05-01 08:24:36,446 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:36" (1/1) ... [2021-05-01 08:24:36,447 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:36" (1/1) ... [2021-05-01 08:24:36,448 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-01 08:24:36,449 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-01 08:24:36,449 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-01 08:24:36,449 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-01 08:24:36,450 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:36" (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 08:24:36,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-01 08:24:36,550 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-01 08:24:36,550 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-01 08:24:36,550 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-01 08:24:36,550 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-01 08:24:36,550 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-01 08:24:36,550 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-01 08:24:36,550 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-01 08:24:36,551 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-01 08:24:36,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-01 08:24:36,551 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-01 08:24:36,551 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-01 08:24:36,551 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-01 08:24:36,551 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-01 08:24:36,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-01 08:24:36,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-01 08:24:36,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-01 08:24:36,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-01 08:24:36,552 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-01 08:24:36,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-01 08:24:36,830 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-01 08:24:36,831 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-01 08:24:36,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:24:36 BoogieIcfgContainer [2021-05-01 08:24:36,832 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-01 08:24:36,833 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-01 08:24:36,833 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-01 08:24:36,835 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-01 08:24:36,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.05 08:24:36" (1/3) ... [2021-05-01 08:24:36,852 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@169ded67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:24:36, skipping insertion in model container [2021-05-01 08:24:36,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:36" (2/3) ... [2021-05-01 08:24:36,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@169ded67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:24:36, skipping insertion in model container [2021-05-01 08:24:36,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:24:36" (3/3) ... [2021-05-01 08:24:36,855 INFO L111 eAbstractionObserver]: Analyzing ICFG lcm2_valuebound20.c [2021-05-01 08:24:36,859 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-01 08:24:36,861 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-01 08:24:36,874 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-01 08:24:36,897 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-01 08:24:36,898 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-01 08:24:36,898 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-01 08:24:36,898 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-01 08:24:36,898 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-01 08:24:36,898 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-01 08:24:36,898 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-01 08:24:36,898 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-01 08:24:36,912 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 08:24:36,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-01 08:24:36,919 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:24:36,920 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 08:24:36,921 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:24:36,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:24:36,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1830914611, now seen corresponding path program 1 times [2021-05-01 08:24:36,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:24:36,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102105555] [2021-05-01 08:24:36,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:24:36,980 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:24:37,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:24:37,109 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:37,110 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:37,110 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:37,111 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:37,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 08:24:37,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:24:37,152 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:37,153 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:37,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-01 08:24:37,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:24:37,156 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:37,156 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:37,156 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:37,157 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:37,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-01 08:24:37,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:24:37,159 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:37,159 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:37,160 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:37,160 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:37,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-01 08:24:37,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:24:37,163 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:37,163 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:37,163 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:37,164 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:37,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-01 08:24:37,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:24:37,166 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:37,166 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:37,167 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:37,167 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:37,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-05-01 08:24:37,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:24:37,169 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:37,170 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:37,170 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:37,171 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:37,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-05-01 08:24:37,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:24:37,173 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:37,173 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:37,174 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:37,174 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:37,175 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 08:24:37,176 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 08:24:37,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1102105555] [2021-05-01 08:24:37,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1102105555] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 08:24:37,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 08:24:37,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-01 08:24:37,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546661930] [2021-05-01 08:24:37,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-01 08:24:37,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 08:24:37,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-01 08:24:37,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 08:24:37,190 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 08:24:37,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 08:24:37,306 INFO L93 Difference]: Finished difference Result 61 states and 90 transitions. [2021-05-01 08:24:37,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-01 08:24:37,308 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 08:24:37,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 08:24:37,313 INFO L225 Difference]: With dead ends: 61 [2021-05-01 08:24:37,314 INFO L226 Difference]: Without dead ends: 29 [2021-05-01 08:24:37,316 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 08:24:37,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-01 08:24:37,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-01 08:24:37,342 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 08:24:37,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2021-05-01 08:24:37,344 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 43 [2021-05-01 08:24:37,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 08:24:37,345 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2021-05-01 08:24:37,345 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 08:24:37,345 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2021-05-01 08:24:37,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-01 08:24:37,346 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:24:37,346 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 08:24:37,347 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-01 08:24:37,347 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:24:37,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:24:37,347 INFO L82 PathProgramCache]: Analyzing trace with hash 206107499, now seen corresponding path program 1 times [2021-05-01 08:24:37,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:24:37,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [684873073] [2021-05-01 08:24:37,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:24:37,350 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:24:37,365 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-01 08:24:37,365 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-05-01 08:24:37,368 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-01 08:24:37,377 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-01 08:24:37,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 08:24:37 BoogieIcfgContainer [2021-05-01 08:24:37,377 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-01 08:24:37,378 INFO L168 Benchmark]: Toolchain (without parser) took 1144.54 ms. Allocated memory is still 182.5 MB. Free memory was 147.6 MB in the beginning and 102.6 MB in the end (delta: 45.0 MB). Peak memory consumption was 44.6 MB. Max. memory is 8.0 GB. [2021-05-01 08:24:37,379 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 182.5 MB. Free memory is still 164.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 08:24:37,379 INFO L168 Benchmark]: CACSL2BoogieTranslator took 175.22 ms. Allocated memory is still 182.5 MB. Free memory was 147.5 MB in the beginning and 165.5 MB in the end (delta: -18.0 MB). Peak memory consumption was 12.1 MB. Max. memory is 8.0 GB. [2021-05-01 08:24:37,379 INFO L168 Benchmark]: Boogie Preprocessor took 37.01 ms. Allocated memory is still 182.5 MB. Free memory was 165.5 MB in the beginning and 163.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-01 08:24:37,380 INFO L168 Benchmark]: RCFGBuilder took 383.02 ms. Allocated memory is still 182.5 MB. Free memory was 163.9 MB in the beginning and 148.2 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-01 08:24:37,380 INFO L168 Benchmark]: TraceAbstraction took 544.15 ms. Allocated memory is still 182.5 MB. Free memory was 147.7 MB in the beginning and 102.6 MB in the end (delta: 45.1 MB). Peak memory consumption was 45.1 MB. Max. memory is 8.0 GB. [2021-05-01 08:24:37,382 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 182.5 MB. Free memory is still 164.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 175.22 ms. Allocated memory is still 182.5 MB. Free memory was 147.5 MB in the beginning and 165.5 MB in the end (delta: -18.0 MB). Peak memory consumption was 12.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 37.01 ms. Allocated memory is still 182.5 MB. Free memory was 165.5 MB in the beginning and 163.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 383.02 ms. Allocated memory is still 182.5 MB. Free memory was 163.9 MB in the beginning and 148.2 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 544.15 ms. Allocated memory is still 182.5 MB. Free memory was 147.7 MB in the beginning and 102.6 MB in the end (delta: 45.1 MB). Peak memory consumption was 45.1 MB. 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<=20) [L9] COND FALSE !(!cond) [L23] RET assume_abort_if_not(a>=0 && a<=20) [L24] b = __VERIFIER_nondet_unsigned_int() [L25] CALL assume_abort_if_not(b>=0 && b<=20) [L9] COND FALSE !(!cond) [L25] RET assume_abort_if_not(b>=0 && b<=20) [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: 473.3ms, OverallIterations: 2, TraceHistogramMax: 6, EmptinessCheckTime: 13.7ms, AutomataDifference: 135.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 32 SDtfs, 18 SDslu, 3 SDs, 0 SdLazy, 11 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 63.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.5ms 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: 18.6ms 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...