/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/egcd3-ll_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-a47f07a [2021-04-16 08:06:39,684 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-16 08:06:39,686 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-16 08:06:39,712 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-04-16 08:06:39,728 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-04-16 08:06:39,730 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-04-16 08:06:39,732 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-04-16 08:06:39,733 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-04-16 08:06:39,736 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-04-16 08:06:39,737 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-04-16 08:06:39,741 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-04-16 08:06:39,746 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-04-16 08:06:39,747 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-04-16 08:06:39,749 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-04-16 08:06:39,750 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-04-16 08:06:39,752 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-04-16 08:06:39,762 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-04-16 08:06:39,769 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-04-16 08:06:39,770 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-04-16 08:06:39,770 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-04-16 08:06:39,779 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-04-16 08:06:39,797 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-16 08:06:39,797 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-16 08:06:39,800 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-16 08:06:39,801 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-16 08:06:39,801 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-16 08:06:39,801 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-16 08:06:39,801 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-16 08:06:39,801 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-16 08:06:39,801 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-16 08:06:39,801 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-16 08:06:39,801 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-16 08:06:39,802 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-16 08:06:39,802 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-16 08:06:39,802 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-16 08:06:39,802 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-16 08:06:39,802 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-16 08:06:39,802 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-16 08:06:39,802 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-16 08:06:39,803 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-16 08:06:39,803 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-16 08:06:39,803 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-04-16 08:06:39,803 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-16 08:06:39,803 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-04-16 08:06:39,803 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-16 08:06:40,139 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-16 08:06:40,161 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-16 08:06:40,164 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-16 08:06:40,164 INFO L271 PluginConnector]: Initializing CDTParser... [2021-04-16 08:06:40,169 INFO L275 PluginConnector]: CDTParser initialized [2021-04-16 08:06:40,170 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound2.c [2021-04-16 08:06:40,233 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ad989801/8fff0a452edc4c2ba0e6e73c87637efb/FLAGe43e92945 [2021-04-16 08:06:40,720 INFO L306 CDTParser]: Found 1 translation units. [2021-04-16 08:06:40,721 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound2.c [2021-04-16 08:06:40,731 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ad989801/8fff0a452edc4c2ba0e6e73c87637efb/FLAGe43e92945 [2021-04-16 08:06:41,111 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ad989801/8fff0a452edc4c2ba0e6e73c87637efb [2021-04-16 08:06:41,120 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-16 08:06:41,123 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-16 08:06:41,127 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-04-16 08:06:41,127 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-04-16 08:06:41,131 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-04-16 08:06:41,132 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.04 08:06:41" (1/1) ... [2021-04-16 08:06:41,133 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f5b81af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:06:41, skipping insertion in model container [2021-04-16 08:06:41,133 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.04 08:06:41" (1/1) ... [2021-04-16 08:06:41,140 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-04-16 08:06:41,158 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-04-16 08:06:41,276 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound2.c[490,503] [2021-04-16 08:06:41,292 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-16 08:06:41,299 INFO L203 MainTranslator]: Completed pre-run [2021-04-16 08:06:41,310 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound2.c[490,503] [2021-04-16 08:06:41,319 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-16 08:06:41,329 INFO L208 MainTranslator]: Completed translation [2021-04-16 08:06:41,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:06:41 WrapperNode [2021-04-16 08:06:41,330 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-04-16 08:06:41,331 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-16 08:06:41,331 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-16 08:06:41,331 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-16 08:06:41,359 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:06:41" (1/1) ... [2021-04-16 08:06:41,360 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:06:41" (1/1) ... [2021-04-16 08:06:41,383 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:06:41" (1/1) ... [2021-04-16 08:06:41,383 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:06:41" (1/1) ... [2021-04-16 08:06:41,388 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:06:41" (1/1) ... [2021-04-16 08:06:41,392 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:06:41" (1/1) ... [2021-04-16 08:06:41,393 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:06:41" (1/1) ... [2021-04-16 08:06:41,395 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-16 08:06:41,396 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-16 08:06:41,396 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-16 08:06:41,396 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-16 08:06:41,397 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:06:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-16 08:06:41,471 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-04-16 08:06:41,471 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-16 08:06:41,471 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-04-16 08:06:41,471 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-04-16 08:06:41,472 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-04-16 08:06:41,472 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-04-16 08:06:41,472 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-04-16 08:06:41,472 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-04-16 08:06:41,472 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-04-16 08:06:41,473 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-04-16 08:06:41,473 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-04-16 08:06:41,473 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-04-16 08:06:41,473 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-04-16 08:06:41,474 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-04-16 08:06:41,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-04-16 08:06:41,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-04-16 08:06:41,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-16 08:06:41,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-04-16 08:06:41,476 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-04-16 08:06:41,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-04-16 08:06:41,722 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-16 08:06:41,722 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-04-16 08:06:41,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.04 08:06:41 BoogieIcfgContainer [2021-04-16 08:06:41,724 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-16 08:06:41,726 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-16 08:06:41,726 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-16 08:06:41,728 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-16 08:06:41,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.04 08:06:41" (1/3) ... [2021-04-16 08:06:41,729 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2faa4cce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.04 08:06:41, skipping insertion in model container [2021-04-16 08:06:41,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:06:41" (2/3) ... [2021-04-16 08:06:41,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2faa4cce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.04 08:06:41, skipping insertion in model container [2021-04-16 08:06:41,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.04 08:06:41" (3/3) ... [2021-04-16 08:06:41,731 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound2.c [2021-04-16 08:06:41,736 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-04-16 08:06:41,739 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-16 08:06:41,755 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-04-16 08:06:41,772 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-16 08:06:41,773 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-16 08:06:41,773 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-04-16 08:06:41,773 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-16 08:06:41,773 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-16 08:06:41,773 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-16 08:06:41,773 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-16 08:06:41,773 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-16 08:06:41,786 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-04-16 08:06:41,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-16 08:06:41,793 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 08:06:41,794 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 08:06:41,794 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 08:06:41,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 08:06:41,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1766263304, now seen corresponding path program 1 times [2021-04-16 08:06:41,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 08:06:41,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [220539867] [2021-04-16 08:06:41,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 08:06:41,859 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 08:06:41,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:06:41,994 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:06:41,995 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:06:41,995 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:06:41,996 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:06:42,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-16 08:06:42,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:06:42,085 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:06:42,086 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:06:42,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-04-16 08:06:42,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:06:42,098 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:06:42,099 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:06:42,100 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:06:42,101 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:06:42,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-04-16 08:06:42,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:06:42,129 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:06:42,130 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:06:42,131 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:06:42,131 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:06:42,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-16 08:06:42,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [220539867] [2021-04-16 08:06:42,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 08:06:42,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-16 08:06:42,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194469818] [2021-04-16 08:06:42,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-16 08:06:42,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-04-16 08:06:42,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-16 08:06:42,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-16 08:06:42,173 INFO L87 Difference]: Start difference. First operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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) [2021-04-16 08:06:42,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 08:06:42,388 INFO L93 Difference]: Finished difference Result 74 states and 111 transitions. [2021-04-16 08:06:42,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-16 08:06:42,390 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 22 [2021-04-16 08:06:42,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 08:06:42,400 INFO L225 Difference]: With dead ends: 74 [2021-04-16 08:06:42,400 INFO L226 Difference]: Without dead ends: 36 [2021-04-16 08:06:42,404 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-16 08:06:42,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-04-16 08:06:42,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-04-16 08:06:42,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-04-16 08:06:42,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2021-04-16 08:06:42,465 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 22 [2021-04-16 08:06:42,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 08:06:42,465 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2021-04-16 08:06:42,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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) [2021-04-16 08:06:42,466 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2021-04-16 08:06:42,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-16 08:06:42,467 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 08:06:42,468 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] [2021-04-16 08:06:42,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-16 08:06:42,468 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 08:06:42,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 08:06:42,469 INFO L82 PathProgramCache]: Analyzing trace with hash -81203399, now seen corresponding path program 1 times [2021-04-16 08:06:42,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 08:06:42,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1605926609] [2021-04-16 08:06:42,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 08:06:42,477 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 08:06:42,513 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-04-16 08:06:42,514 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-04-16 08:06:42,518 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-04-16 08:06:42,536 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-04-16 08:06:42,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.04 08:06:42 BoogieIcfgContainer [2021-04-16 08:06:42,536 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-16 08:06:42,539 INFO L168 Benchmark]: Toolchain (without parser) took 1414.86 ms. Allocated memory is still 182.5 MB. Free memory was 149.1 MB in the beginning and 103.9 MB in the end (delta: 45.1 MB). Peak memory consumption was 44.3 MB. Max. memory is 8.0 GB. [2021-04-16 08:06:42,540 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 182.5 MB. Free memory was 165.6 MB in the beginning and 165.5 MB in the end (delta: 113.3 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-04-16 08:06:42,541 INFO L168 Benchmark]: CACSL2BoogieTranslator took 203.26 ms. Allocated memory is still 182.5 MB. Free memory was 148.9 MB in the beginning and 138.6 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-04-16 08:06:42,542 INFO L168 Benchmark]: Boogie Preprocessor took 63.83 ms. Allocated memory is still 182.5 MB. Free memory was 138.6 MB in the beginning and 165.8 MB in the end (delta: -27.2 MB). Peak memory consumption was 3.4 MB. Max. memory is 8.0 GB. [2021-04-16 08:06:42,543 INFO L168 Benchmark]: RCFGBuilder took 328.39 ms. Allocated memory is still 182.5 MB. Free memory was 165.8 MB in the beginning and 148.0 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-04-16 08:06:42,543 INFO L168 Benchmark]: TraceAbstraction took 810.88 ms. Allocated memory is still 182.5 MB. Free memory was 148.0 MB in the beginning and 103.9 MB in the end (delta: 44.0 MB). Peak memory consumption was 44.0 MB. Max. memory is 8.0 GB. [2021-04-16 08:06:42,550 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 182.5 MB. Free memory was 165.6 MB in the beginning and 165.5 MB in the end (delta: 113.3 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 203.26 ms. Allocated memory is still 182.5 MB. Free memory was 148.9 MB in the beginning and 138.6 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 63.83 ms. Allocated memory is still 182.5 MB. Free memory was 138.6 MB in the beginning and 165.8 MB in the end (delta: -27.2 MB). Peak memory consumption was 3.4 MB. Max. memory is 8.0 GB. * RCFGBuilder took 328.39 ms. Allocated memory is still 182.5 MB. Free memory was 165.8 MB in the beginning and 148.0 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 810.88 ms. Allocated memory is still 182.5 MB. Free memory was 148.0 MB in the beginning and 103.9 MB in the end (delta: 44.0 MB). Peak memory consumption was 44.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 13]: 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: [L18] int counter = 0; [L20] int x, y; [L21] long long a, b, p, q, r, s; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) [L8] COND FALSE !(!cond) [L24] RET assume_abort_if_not(x >= 1) [L25] CALL assume_abort_if_not(y >= 1) [L8] COND FALSE !(!cond) [L25] RET assume_abort_if_not(y >= 1) [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 [L34] EXPR counter++ [L34] COND FALSE !(counter++<2) [L73] CALL __VERIFIER_assert(p*x - q*x + r*y - s*y == a) [L11] COND TRUE !(cond) [L13] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 748.1ms, OverallIterations: 2, TraceHistogramMax: 2, EmptinessCheckTime: 11.7ms, AutomataDifference: 262.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 46 SDtfs, 10 SDslu, 4 SDs, 0 SdLazy, 29 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 108.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred 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: 44.8ms AutomataMinimizationTime, 1 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 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...