/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_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-1a84f73 [2021-05-01 08:24:35,738 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-01 08:24:35,742 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-01 08:24:35,797 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-01 08:24:35,829 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-01 08:24:35,832 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-01 08:24:35,835 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-01 08:24:35,836 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-01 08:24:35,838 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-01 08:24:35,839 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-01 08:24:35,845 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-01 08:24:35,855 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-01 08:24:35,856 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-01 08:24:35,859 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-01 08:24:35,860 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-01 08:24:35,863 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-01 08:24:35,871 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-01 08:24:35,882 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-01 08:24:35,883 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-01 08:24:35,884 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-01 08:24:35,885 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 08:24:35,916 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-01 08:24:35,916 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-01 08:24:35,920 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-01 08:24:35,921 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-01 08:24:35,921 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-01 08:24:35,921 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-01 08:24:35,921 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-01 08:24:35,921 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-01 08:24:35,921 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-01 08:24:35,921 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-01 08:24:35,923 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-01 08:24:35,923 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-01 08:24:35,924 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-01 08:24:35,924 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-01 08:24:35,924 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-01 08:24:35,924 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-01 08:24:35,924 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-01 08:24:35,924 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-01 08:24:35,925 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-01 08:24:35,925 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-01 08:24:35,925 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-01 08:24:35,925 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-01 08:24:35,925 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-01 08:24:35,925 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-01 08:24:36,331 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-01 08:24:36,354 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-01 08:24:36,356 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-01 08:24:36,357 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-01 08:24:36,358 INFO L275 PluginConnector]: CDTParser initialized [2021-05-01 08:24:36,359 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/lcm2_valuebound100.c [2021-05-01 08:24:36,422 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3c001ac4/827734bffbae4df6b3d8010b1dbb4ec8/FLAG95418b1a7 [2021-05-01 08:24:37,026 INFO L306 CDTParser]: Found 1 translation units. [2021-05-01 08:24:37,027 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm2_valuebound100.c [2021-05-01 08:24:37,035 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3c001ac4/827734bffbae4df6b3d8010b1dbb4ec8/FLAG95418b1a7 [2021-05-01 08:24:37,324 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3c001ac4/827734bffbae4df6b3d8010b1dbb4ec8 [2021-05-01 08:24:37,327 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-01 08:24:37,330 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-01 08:24:37,333 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-01 08:24:37,333 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-01 08:24:37,337 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-01 08:24:37,338 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:24:37" (1/1) ... [2021-05-01 08:24:37,340 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b3f8870 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:37, skipping insertion in model container [2021-05-01 08:24:37,340 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:24:37" (1/1) ... [2021-05-01 08:24:37,348 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-01 08:24:37,370 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-01 08:24:37,545 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_valuebound100.c[545,558] [2021-05-01 08:24:37,562 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:24:37,577 INFO L203 MainTranslator]: Completed pre-run [2021-05-01 08:24:37,596 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_valuebound100.c[545,558] [2021-05-01 08:24:37,623 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:24:37,638 INFO L208 MainTranslator]: Completed translation [2021-05-01 08:24:37,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:37 WrapperNode [2021-05-01 08:24:37,639 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-01 08:24:37,642 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-01 08:24:37,642 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-01 08:24:37,643 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-01 08:24:37,655 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:37" (1/1) ... [2021-05-01 08:24:37,656 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:37" (1/1) ... [2021-05-01 08:24:37,676 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:37" (1/1) ... [2021-05-01 08:24:37,676 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:37" (1/1) ... [2021-05-01 08:24:37,682 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:37" (1/1) ... [2021-05-01 08:24:37,687 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:37" (1/1) ... [2021-05-01 08:24:37,695 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:37" (1/1) ... [2021-05-01 08:24:37,705 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-01 08:24:37,707 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-01 08:24:37,707 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-01 08:24:37,707 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-01 08:24:37,709 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:37" (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 08:24:37,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-01 08:24:37,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-01 08:24:37,856 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-01 08:24:37,856 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-01 08:24:37,856 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-01 08:24:37,856 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-01 08:24:37,856 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-01 08:24:37,857 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-01 08:24:37,857 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-01 08:24:37,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-01 08:24:37,858 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-01 08:24:37,858 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-01 08:24:37,858 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-01 08:24:37,858 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-01 08:24:37,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-01 08:24:37,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-01 08:24:37,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-01 08:24:37,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-01 08:24:37,860 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-01 08:24:37,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-01 08:24:38,302 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-01 08:24:38,303 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-01 08:24:38,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:24:38 BoogieIcfgContainer [2021-05-01 08:24:38,305 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-01 08:24:38,306 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-01 08:24:38,307 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-01 08:24:38,309 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-01 08:24:38,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.05 08:24:37" (1/3) ... [2021-05-01 08:24:38,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54bc9036 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:24:38, skipping insertion in model container [2021-05-01 08:24:38,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:37" (2/3) ... [2021-05-01 08:24:38,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54bc9036 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:24:38, skipping insertion in model container [2021-05-01 08:24:38,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:24:38" (3/3) ... [2021-05-01 08:24:38,313 INFO L111 eAbstractionObserver]: Analyzing ICFG lcm2_valuebound100.c [2021-05-01 08:24:38,319 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-01 08:24:38,323 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-01 08:24:38,341 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-01 08:24:38,371 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-01 08:24:38,371 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-01 08:24:38,371 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-01 08:24:38,371 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-01 08:24:38,371 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-01 08:24:38,371 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-01 08:24:38,372 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-01 08:24:38,372 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-01 08:24:38,396 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 08:24:38,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-01 08:24:38,407 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:24:38,408 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 08:24:38,408 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:24:38,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:24:38,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1830914611, now seen corresponding path program 1 times [2021-05-01 08:24:38,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:24:38,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [672152742] [2021-05-01 08:24:38,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:24:38,501 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:24:38,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:24:38,679 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:38,680 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:38,682 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:38,683 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:38,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 08:24:38,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:24:38,795 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:38,796 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:38,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-01 08:24:38,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:24:38,809 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:38,811 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:38,813 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:38,815 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:38,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-01 08:24:38,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:24:38,824 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:38,826 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:38,828 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:38,829 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:38,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-01 08:24:38,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:24:38,836 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:38,839 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:38,840 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:38,841 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:38,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-01 08:24:38,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:24:38,846 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:38,846 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:38,847 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:38,848 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:38,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-05-01 08:24:38,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:24:38,852 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:38,853 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:38,853 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:38,854 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:38,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-05-01 08:24:38,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:24:38,858 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:38,859 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:38,860 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:38,860 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:38,862 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 08:24:38,863 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 08:24:38,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [672152742] [2021-05-01 08:24:38,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [672152742] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 08:24:38,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 08:24:38,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-01 08:24:38,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893390887] [2021-05-01 08:24:38,871 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-01 08:24:38,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 08:24:38,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-01 08:24:38,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 08:24:38,892 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 08:24:39,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 08:24:39,095 INFO L93 Difference]: Finished difference Result 61 states and 90 transitions. [2021-05-01 08:24:39,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-01 08:24:39,099 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 08:24:39,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 08:24:39,111 INFO L225 Difference]: With dead ends: 61 [2021-05-01 08:24:39,112 INFO L226 Difference]: Without dead ends: 29 [2021-05-01 08:24:39,117 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 89.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 08:24:39,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-01 08:24:39,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-01 08:24:39,172 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 08:24:39,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2021-05-01 08:24:39,176 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 43 [2021-05-01 08:24:39,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 08:24:39,176 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2021-05-01 08:24:39,177 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 08:24:39,177 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2021-05-01 08:24:39,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-01 08:24:39,179 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:24:39,182 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 08:24:39,183 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-01 08:24:39,183 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:24:39,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:24:39,184 INFO L82 PathProgramCache]: Analyzing trace with hash 206107499, now seen corresponding path program 1 times [2021-05-01 08:24:39,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:24:39,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622574313] [2021-05-01 08:24:39,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:24:39,187 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:24:39,209 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-01 08:24:39,210 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-05-01 08:24:39,216 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-01 08:24:39,234 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-01 08:24:39,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 08:24:39 BoogieIcfgContainer [2021-05-01 08:24:39,236 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-01 08:24:39,239 INFO L168 Benchmark]: Toolchain (without parser) took 1908.74 ms. Allocated memory is still 167.8 MB. Free memory was 134.5 MB in the beginning and 145.4 MB in the end (delta: -10.9 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 08:24:39,245 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 167.8 MB. Free memory is still 150.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 08:24:39,247 INFO L168 Benchmark]: CACSL2BoogieTranslator took 306.28 ms. Allocated memory is still 167.8 MB. Free memory was 134.3 MB in the beginning and 124.2 MB in the end (delta: 10.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-01 08:24:39,248 INFO L168 Benchmark]: Boogie Preprocessor took 63.92 ms. Allocated memory is still 167.8 MB. Free memory was 124.2 MB in the beginning and 122.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-01 08:24:39,249 INFO L168 Benchmark]: RCFGBuilder took 597.80 ms. Allocated memory is still 167.8 MB. Free memory was 122.6 MB in the beginning and 137.8 MB in the end (delta: -15.3 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. [2021-05-01 08:24:39,249 INFO L168 Benchmark]: TraceAbstraction took 930.56 ms. Allocated memory is still 167.8 MB. Free memory was 137.4 MB in the beginning and 145.4 MB in the end (delta: -8.0 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 08:24:39,255 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 167.8 MB. Free memory is still 150.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 306.28 ms. Allocated memory is still 167.8 MB. Free memory was 134.3 MB in the beginning and 124.2 MB in the end (delta: 10.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 63.92 ms. Allocated memory is still 167.8 MB. Free memory was 124.2 MB in the beginning and 122.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 597.80 ms. Allocated memory is still 167.8 MB. Free memory was 122.6 MB in the beginning and 137.8 MB in the end (delta: -15.3 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 930.56 ms. Allocated memory is still 167.8 MB. Free memory was 137.4 MB in the beginning and 145.4 MB in the end (delta: -8.0 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<=100) [L9] COND FALSE !(!cond) [L23] RET assume_abort_if_not(a>=0 && a<=100) [L24] b = __VERIFIER_nondet_unsigned_int() [L25] CALL assume_abort_if_not(b>=0 && b<=100) [L9] COND FALSE !(!cond) [L25] RET assume_abort_if_not(b>=0 && b<=100) [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: 848.7ms, OverallIterations: 2, TraceHistogramMax: 6, EmptinessCheckTime: 20.2ms, AutomataDifference: 244.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 17.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 32 SDtfs, 18 SDslu, 3 SDs, 0 SdLazy, 11 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 105.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 89.1ms 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: 45.9ms 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...