/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loop-invariants/eq1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 19:05:35,568 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 19:05:35,570 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 19:05:35,600 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 19:05:35,643 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 19:05:35,645 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 19:05:35,645 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 19:05:35,648 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 19:05:35,687 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 19:05:35,687 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 19:05:35,689 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 19:05:35,689 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 19:05:35,690 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 19:05:35,690 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 19:05:35,690 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 19:05:35,690 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 19:05:35,690 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 19:05:35,690 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 19:05:35,691 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 19:05:35,691 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 19:05:35,691 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 19:05:35,691 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 19:05:35,691 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 19:05:35,691 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 19:05:35,691 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 19:05:35,692 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 19:05:35,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 19:05:35,692 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 19:05:35,692 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 19:05:35,693 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 19:05:35,693 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 19:05:36,085 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 19:05:36,128 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 19:05:36,130 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 19:05:36,130 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 19:05:36,137 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 19:05:36,137 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invariants/eq1.c [2021-05-02 19:05:36,199 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2459e9ab2/b973ebd80c3e4da8a37f45253e772200/FLAG10e7cd570 [2021-05-02 19:05:36,509 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 19:05:36,509 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/eq1.c [2021-05-02 19:05:36,513 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2459e9ab2/b973ebd80c3e4da8a37f45253e772200/FLAG10e7cd570 [2021-05-02 19:05:36,937 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2459e9ab2/b973ebd80c3e4da8a37f45253e772200 [2021-05-02 19:05:36,939 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 19:05:36,940 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 19:05:36,944 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 19:05:36,945 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 19:05:36,947 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 19:05:36,948 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:05:36" (1/1) ... [2021-05-02 19:05:36,949 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fffb95f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:05:36, skipping insertion in model container [2021-05-02 19:05:36,949 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:05:36" (1/1) ... [2021-05-02 19:05:36,957 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 19:05:36,967 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 19:05:37,050 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/eq1.c[364,377] [2021-05-02 19:05:37,058 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:05:37,064 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 19:05:37,073 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/eq1.c[364,377] [2021-05-02 19:05:37,075 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:05:37,104 INFO L208 MainTranslator]: Completed translation [2021-05-02 19:05:37,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:05:37 WrapperNode [2021-05-02 19:05:37,105 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 19:05:37,122 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 19:05:37,123 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 19:05:37,123 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 19:05:37,131 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:05:37" (1/1) ... [2021-05-02 19:05:37,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:05:37" (1/1) ... [2021-05-02 19:05:37,136 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:05:37" (1/1) ... [2021-05-02 19:05:37,137 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:05:37" (1/1) ... [2021-05-02 19:05:37,147 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:05:37" (1/1) ... [2021-05-02 19:05:37,149 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:05:37" (1/1) ... [2021-05-02 19:05:37,156 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:05:37" (1/1) ... [2021-05-02 19:05:37,162 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 19:05:37,163 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 19:05:37,163 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 19:05:37,163 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 19:05:37,164 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:05:37" (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 [2021-05-02 19:05:37,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 19:05:37,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 19:05:37,305 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 19:05:37,305 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 19:05:37,305 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 19:05:37,306 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 19:05:37,306 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 19:05:37,306 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 19:05:37,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 19:05:37,306 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-05-02 19:05:37,307 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 19:05:37,307 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 19:05:37,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 19:05:37,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 19:05:37,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 19:05:37,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 19:05:37,308 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 19:05:37,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 19:05:37,520 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 19:05:37,520 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 19:05:37,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:05:37 BoogieIcfgContainer [2021-05-02 19:05:37,521 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 19:05:37,522 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 19:05:37,522 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 19:05:37,522 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 19:05:37,524 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:05:37" (1/1) ... [2021-05-02 19:05:37,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:05:37 BasicIcfg [2021-05-02 19:05:37,535 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 19:05:37,536 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 19:05:37,536 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 19:05:37,538 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 19:05:37,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 07:05:36" (1/4) ... [2021-05-02 19:05:37,539 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@502b3a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:05:37, skipping insertion in model container [2021-05-02 19:05:37,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:05:37" (2/4) ... [2021-05-02 19:05:37,539 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@502b3a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:05:37, skipping insertion in model container [2021-05-02 19:05:37,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:05:37" (3/4) ... [2021-05-02 19:05:37,539 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@502b3a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:05:37, skipping insertion in model container [2021-05-02 19:05:37,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:05:37" (4/4) ... [2021-05-02 19:05:37,540 INFO L111 eAbstractionObserver]: Analyzing ICFG eq1.cJordan [2021-05-02 19:05:37,544 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 19:05:37,546 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 19:05:37,558 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 19:05:37,570 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 19:05:37,571 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 19:05:37,571 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 19:05:37,571 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 19:05:37,571 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 19:05:37,571 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 19:05:37,571 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 19:05:37,571 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 19:05:37,580 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 19:05:37,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 19:05:37,584 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:05:37,585 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:05:37,585 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:05:37,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:05:37,589 INFO L82 PathProgramCache]: Analyzing trace with hash -154368955, now seen corresponding path program 1 times [2021-05-02 19:05:37,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:05:37,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513845862] [2021-05-02 19:05:37,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:05:37,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:05:37,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:05:37,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:05:37,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:05:37,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:05:37,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513845862] [2021-05-02 19:05:37,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513845862] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:05:37,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:05:37,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 19:05:37,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592397495] [2021-05-02 19:05:37,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 19:05:37,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:05:37,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 19:05:37,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:05:37,745 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:05:37,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:05:37,814 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2021-05-02 19:05:37,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 19:05:37,817 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 19:05:37,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:05:37,822 INFO L225 Difference]: With dead ends: 20 [2021-05-02 19:05:37,822 INFO L226 Difference]: Without dead ends: 13 [2021-05-02 19:05:37,823 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:05:37,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-05-02 19:05:37,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-05-02 19:05:37,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:05:37,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-05-02 19:05:37,844 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2021-05-02 19:05:37,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:05:37,844 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-05-02 19:05:37,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:05:37,845 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-05-02 19:05:37,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 19:05:37,846 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:05:37,846 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:05:37,846 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 19:05:37,847 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:05:37,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:05:37,850 INFO L82 PathProgramCache]: Analyzing trace with hash -153445434, now seen corresponding path program 1 times [2021-05-02 19:05:37,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:05:37,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445567240] [2021-05-02 19:05:37,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:05:37,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:05:38,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:05:38,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:05:38,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:05:38,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:05:38,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445567240] [2021-05-02 19:05:38,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445567240] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:05:38,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:05:38,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 19:05:38,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254912191] [2021-05-02 19:05:38,077 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 19:05:38,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:05:38,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 19:05:38,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 19:05:38,078 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:05:38,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:05:38,216 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2021-05-02 19:05:38,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 19:05:38,216 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 19:05:38,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:05:38,217 INFO L225 Difference]: With dead ends: 11 [2021-05-02 19:05:38,217 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 19:05:38,218 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 136.6ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 19:05:38,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 19:05:38,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 19:05:38,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 19:05:38,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 19:05:38,219 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2021-05-02 19:05:38,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:05:38,219 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 19:05:38,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:05:38,219 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 19:05:38,219 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 19:05:38,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 19:05:38,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:05:38 BasicIcfg [2021-05-02 19:05:38,224 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 19:05:38,225 INFO L168 Benchmark]: Toolchain (without parser) took 1284.23 ms. Allocated memory is still 169.9 MB. Free memory was 134.6 MB in the beginning and 134.4 MB in the end (delta: 161.9 kB). Peak memory consumption was 194.5 kB. Max. memory is 8.0 GB. [2021-05-02 19:05:38,225 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 169.9 MB. Free memory was 151.5 MB in the beginning and 151.4 MB in the end (delta: 105.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 19:05:38,226 INFO L168 Benchmark]: CACSL2BoogieTranslator took 160.78 ms. Allocated memory is still 169.9 MB. Free memory was 134.3 MB in the beginning and 154.4 MB in the end (delta: -20.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-02 19:05:38,227 INFO L168 Benchmark]: Boogie Preprocessor took 39.93 ms. Allocated memory is still 169.9 MB. Free memory was 154.0 MB in the beginning and 152.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 19:05:38,228 INFO L168 Benchmark]: RCFGBuilder took 358.28 ms. Allocated memory is still 169.9 MB. Free memory was 152.1 MB in the beginning and 138.6 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-02 19:05:38,233 INFO L168 Benchmark]: IcfgTransformer took 13.25 ms. Allocated memory is still 169.9 MB. Free memory was 138.6 MB in the beginning and 137.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 19:05:38,233 INFO L168 Benchmark]: TraceAbstraction took 688.18 ms. Allocated memory is still 169.9 MB. Free memory was 136.9 MB in the beginning and 134.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 4.1 MB. Max. memory is 8.0 GB. [2021-05-02 19:05:38,237 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 169.9 MB. Free memory was 151.5 MB in the beginning and 151.4 MB in the end (delta: 105.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 160.78 ms. Allocated memory is still 169.9 MB. Free memory was 134.3 MB in the beginning and 154.4 MB in the end (delta: -20.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 39.93 ms. Allocated memory is still 169.9 MB. Free memory was 154.0 MB in the beginning and 152.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 358.28 ms. Allocated memory is still 169.9 MB. Free memory was 152.1 MB in the beginning and 138.6 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * IcfgTransformer took 13.25 ms. Allocated memory is still 169.9 MB. Free memory was 138.6 MB in the beginning and 137.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 688.18 ms. Allocated memory is still 169.9 MB. Free memory was 136.9 MB in the beginning and 134.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 4.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 652.1ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 8.6ms, AutomataDifference: 227.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 27 SDtfs, 18 SDslu, 19 SDs, 0 SdLazy, 23 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 48.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 160.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, InterpolantAutomatonStates: 9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 12.4ms AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 10.4ms SsaConstructionTime, 84.2ms SatisfiabilityAnalysisTime, 217.8ms InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 98 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...