/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/geo1-u_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-1a84f73 [2021-05-01 08:23:34,312 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-01 08:23:34,314 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-01 08:23:34,342 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-01 08:23:34,350 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-01 08:23:34,350 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-01 08:23:34,351 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-01 08:23:34,352 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-01 08:23:34,353 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-01 08:23:34,354 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-01 08:23:34,355 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-01 08:23:34,356 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-01 08:23:34,357 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-01 08:23:34,358 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-01 08:23:34,359 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-01 08:23:34,360 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-01 08:23:34,361 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-01 08:23:34,367 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-01 08:23:34,369 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-01 08:23:34,369 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-01 08:23:34,371 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 08:23:34,383 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-01 08:23:34,384 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-01 08:23:34,386 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-01 08:23:34,386 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-01 08:23:34,386 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-01 08:23:34,386 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-01 08:23:34,387 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-01 08:23:34,387 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-01 08:23:34,387 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-01 08:23:34,387 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-01 08:23:34,387 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-01 08:23:34,388 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-01 08:23:34,388 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-01 08:23:34,388 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-01 08:23:34,388 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-01 08:23:34,388 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-01 08:23:34,388 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-01 08:23:34,388 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-01 08:23:34,388 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-01 08:23:34,389 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-01 08:23:34,389 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-01 08:23:34,389 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-01 08:23:34,389 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-01 08:23:34,389 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-01 08:23:34,672 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-01 08:23:34,687 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-01 08:23:34,689 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-01 08:23:34,690 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-01 08:23:34,690 INFO L275 PluginConnector]: CDTParser initialized [2021-05-01 08:23:34,691 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo1-u_valuebound50.c [2021-05-01 08:23:34,747 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c812c6610/11e1e0b537d54f04981cbde99b90c4f8/FLAG44d3dbd56 [2021-05-01 08:23:35,128 INFO L306 CDTParser]: Found 1 translation units. [2021-05-01 08:23:35,129 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo1-u_valuebound50.c [2021-05-01 08:23:35,134 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c812c6610/11e1e0b537d54f04981cbde99b90c4f8/FLAG44d3dbd56 [2021-05-01 08:23:35,555 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c812c6610/11e1e0b537d54f04981cbde99b90c4f8 [2021-05-01 08:23:35,558 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-01 08:23:35,561 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-01 08:23:35,564 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-01 08:23:35,564 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-01 08:23:35,567 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-01 08:23:35,568 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:23:35" (1/1) ... [2021-05-01 08:23:35,569 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76d1a398 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:23:35, skipping insertion in model container [2021-05-01 08:23:35,569 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:23:35" (1/1) ... [2021-05-01 08:23:35,575 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-01 08:23:35,590 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-01 08:23:35,690 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/geo1-u_valuebound50.c[563,576] [2021-05-01 08:23:35,698 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:23:35,704 INFO L203 MainTranslator]: Completed pre-run [2021-05-01 08:23:35,713 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/geo1-u_valuebound50.c[563,576] [2021-05-01 08:23:35,717 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:23:35,726 INFO L208 MainTranslator]: Completed translation [2021-05-01 08:23:35,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:23:35 WrapperNode [2021-05-01 08:23:35,726 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-01 08:23:35,727 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-01 08:23:35,727 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-01 08:23:35,727 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-01 08:23:35,734 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:23:35" (1/1) ... [2021-05-01 08:23:35,735 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:23:35" (1/1) ... [2021-05-01 08:23:35,739 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:23:35" (1/1) ... [2021-05-01 08:23:35,739 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:23:35" (1/1) ... [2021-05-01 08:23:35,742 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:23:35" (1/1) ... [2021-05-01 08:23:35,745 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:23:35" (1/1) ... [2021-05-01 08:23:35,746 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:23:35" (1/1) ... [2021-05-01 08:23:35,747 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-01 08:23:35,748 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-01 08:23:35,748 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-01 08:23:35,748 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-01 08:23:35,774 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:23:35" (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 08:23:35,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-01 08:23:35,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-01 08:23:35,881 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-01 08:23:35,881 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-01 08:23:35,881 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-01 08:23:35,881 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-01 08:23:35,881 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-01 08:23:35,881 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-01 08:23:35,881 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-01 08:23:35,882 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-01 08:23:35,882 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-01 08:23:35,882 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-01 08:23:35,882 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-01 08:23:35,883 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-01 08:23:35,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-01 08:23:35,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-01 08:23:35,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-01 08:23:35,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-01 08:23:35,884 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-01 08:23:35,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-01 08:23:36,169 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-01 08:23:36,169 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-01 08:23:36,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:23:36 BoogieIcfgContainer [2021-05-01 08:23:36,170 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-01 08:23:36,171 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-01 08:23:36,172 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-01 08:23:36,174 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-01 08:23:36,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.05 08:23:35" (1/3) ... [2021-05-01 08:23:36,175 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f0a312 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:23:36, skipping insertion in model container [2021-05-01 08:23:36,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:23:35" (2/3) ... [2021-05-01 08:23:36,175 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f0a312 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:23:36, skipping insertion in model container [2021-05-01 08:23:36,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:23:36" (3/3) ... [2021-05-01 08:23:36,176 INFO L111 eAbstractionObserver]: Analyzing ICFG geo1-u_valuebound50.c [2021-05-01 08:23:36,180 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-01 08:23:36,182 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-01 08:23:36,206 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-01 08:23:36,223 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-01 08:23:36,223 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-01 08:23:36,223 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-01 08:23:36,223 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-01 08:23:36,223 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-01 08:23:36,224 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-01 08:23:36,224 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-01 08:23:36,224 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-01 08:23:36,239 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-01 08:23:36,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-01 08:23:36,245 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:23:36,246 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 08:23:36,246 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:23:36,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:23:36,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1335806002, now seen corresponding path program 1 times [2021-05-01 08:23:36,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:23:36,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1014247136] [2021-05-01 08:23:36,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:23:36,309 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:23:36,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:23:36,422 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:23:36,423 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:23:36,423 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:23:36,424 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:23:36,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 08:23:36,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:23:36,515 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:23:36,516 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:23:36,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-01 08:23:36,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:23:36,522 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:23:36,523 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:23:36,524 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:23:36,524 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:23:36,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-01 08:23:36,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:23:36,534 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:23:36,535 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:23:36,537 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:23:36,537 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:23:36,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-01 08:23:36,540 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 08:23:36,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1014247136] [2021-05-01 08:23:36,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1014247136] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 08:23:36,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 08:23:36,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-01 08:23:36,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477295612] [2021-05-01 08:23:36,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-01 08:23:36,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 08:23:36,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-01 08:23:36,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 08:23:36,559 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-01 08:23:36,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 08:23:36,660 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2021-05-01 08:23:36,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-01 08:23:36,662 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-01 08:23:36,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 08:23:36,667 INFO L225 Difference]: With dead ends: 53 [2021-05-01 08:23:36,667 INFO L226 Difference]: Without dead ends: 25 [2021-05-01 08:23:36,669 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 63.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 08:23:36,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-01 08:23:36,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-01 08:23:36,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-01 08:23:36,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-05-01 08:23:36,705 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 23 [2021-05-01 08:23:36,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 08:23:36,705 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-05-01 08:23:36,705 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-01 08:23:36,705 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-05-01 08:23:36,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-01 08:23:36,707 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:23:36,707 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 08:23:36,707 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-01 08:23:36,707 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:23:36,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:23:36,708 INFO L82 PathProgramCache]: Analyzing trace with hash 736000694, now seen corresponding path program 1 times [2021-05-01 08:23:36,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:23:36,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1942862775] [2021-05-01 08:23:36,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:23:36,710 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:23:36,722 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-01 08:23:36,722 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-05-01 08:23:36,726 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-01 08:23:36,738 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-01 08:23:36,739 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 08:23:36 BoogieIcfgContainer [2021-05-01 08:23:36,739 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-01 08:23:36,740 INFO L168 Benchmark]: Toolchain (without parser) took 1178.77 ms. Allocated memory is still 218.1 MB. Free memory was 184.6 MB in the beginning and 151.9 MB in the end (delta: 32.6 MB). Peak memory consumption was 31.7 MB. Max. memory is 8.0 GB. [2021-05-01 08:23:36,741 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 218.1 MB. Free memory was 201.0 MB in the beginning and 200.9 MB in the end (delta: 106.0 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 08:23:36,741 INFO L168 Benchmark]: CACSL2BoogieTranslator took 162.60 ms. Allocated memory is still 218.1 MB. Free memory was 184.4 MB in the beginning and 174.7 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-01 08:23:36,742 INFO L168 Benchmark]: Boogie Preprocessor took 19.53 ms. Allocated memory is still 218.1 MB. Free memory was 174.7 MB in the beginning and 173.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-01 08:23:36,742 INFO L168 Benchmark]: RCFGBuilder took 422.94 ms. Allocated memory is still 218.1 MB. Free memory was 173.2 MB in the beginning and 188.1 MB in the end (delta: -15.0 MB). Peak memory consumption was 4.4 MB. Max. memory is 8.0 GB. [2021-05-01 08:23:36,743 INFO L168 Benchmark]: TraceAbstraction took 567.48 ms. Allocated memory is still 218.1 MB. Free memory was 187.6 MB in the beginning and 151.9 MB in the end (delta: 35.7 MB). Peak memory consumption was 35.7 MB. Max. memory is 8.0 GB. [2021-05-01 08:23:36,744 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 218.1 MB. Free memory was 201.0 MB in the beginning and 200.9 MB in the end (delta: 106.0 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 162.60 ms. Allocated memory is still 218.1 MB. Free memory was 184.4 MB in the beginning and 174.7 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 19.53 ms. Allocated memory is still 218.1 MB. Free memory was 174.7 MB in the beginning and 173.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 422.94 ms. Allocated memory is still 218.1 MB. Free memory was 173.2 MB in the beginning and 188.1 MB in the end (delta: -15.0 MB). Peak memory consumption was 4.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 567.48 ms. Allocated memory is still 218.1 MB. Free memory was 187.6 MB in the beginning and 151.9 MB in the end (delta: 35.7 MB). Peak memory consumption was 35.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 18]: 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 z, k; [L24] long long x, y, c; [L25] z = __VERIFIER_nondet_unsigned_int() [L26] CALL assume_abort_if_not(z>=0 && z<=50) [L13] COND FALSE !(!cond) [L26] RET assume_abort_if_not(z>=0 && z<=50) [L27] k = __VERIFIER_nondet_unsigned_int() [L28] CALL assume_abort_if_not(k>=0 && k<=50) [L13] COND FALSE !(!cond) [L28] RET assume_abort_if_not(k>=0 && k<=50) [L30] x = 1 [L31] y = z [L32] c = 1 [L34] COND TRUE 1 [L35] CALL __VERIFIER_assert(x*z - x - y + 1 == 0) [L16] COND TRUE !(cond) [L18] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 507.3ms, OverallIterations: 2, TraceHistogramMax: 2, EmptinessCheckTime: 11.9ms, AutomataDifference: 121.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 27 SDtfs, 17 SDslu, 3 SDs, 0 SdLazy, 7 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 42.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 63.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred 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: 25.1ms 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...