/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loops/while_infinite_loop_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-1a84f73 [2021-05-01 03:01:24,851 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-01 03:01:24,858 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-01 03:01:24,922 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-01 03:01:25,070 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-01 03:01:25,109 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-01 03:01:25,109 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-01 03:01:25,116 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-01 03:01:25,117 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-01 03:01:25,117 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-01 03:01:25,117 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-01 03:01:25,117 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-01 03:01:25,117 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-01 03:01:25,117 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-01 03:01:25,118 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-01 03:01:25,119 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-01 03:01:25,119 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-01 03:01:25,119 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-01 03:01:25,120 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-01 03:01:25,120 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-01 03:01:25,120 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-01 03:01:25,120 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-01 03:01:25,120 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-01 03:01:25,121 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-01 03:01:25,121 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-01 03:01:25,121 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-01 03:01:25,124 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-01 03:01:25,124 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-01 03:01:25,626 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-01 03:01:25,673 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-01 03:01:25,676 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-01 03:01:25,678 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-01 03:01:25,686 INFO L275 PluginConnector]: CDTParser initialized [2021-05-01 03:01:25,688 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/while_infinite_loop_1.c [2021-05-01 03:01:25,829 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f89b0b144/bf9d4d83032b408782fcd5c5f2d41290/FLAGf0c85ce0a [2021-05-01 03:01:26,665 INFO L306 CDTParser]: Found 1 translation units. [2021-05-01 03:01:26,666 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/while_infinite_loop_1.c [2021-05-01 03:01:26,678 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f89b0b144/bf9d4d83032b408782fcd5c5f2d41290/FLAGf0c85ce0a [2021-05-01 03:01:26,922 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f89b0b144/bf9d4d83032b408782fcd5c5f2d41290 [2021-05-01 03:01:26,927 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-01 03:01:26,934 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-01 03:01:26,938 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-01 03:01:26,939 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-01 03:01:26,944 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-01 03:01:26,946 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 03:01:26" (1/1) ... [2021-05-01 03:01:26,949 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e5a4a8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 03:01:26, skipping insertion in model container [2021-05-01 03:01:26,950 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 03:01:26" (1/1) ... [2021-05-01 03:01:26,962 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-01 03:01:26,984 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-01 03:01:27,140 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/while_infinite_loop_1.c[333,346] [2021-05-01 03:01:27,169 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 03:01:27,190 INFO L203 MainTranslator]: Completed pre-run [2021-05-01 03:01:27,208 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/while_infinite_loop_1.c[333,346] [2021-05-01 03:01:27,214 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 03:01:27,234 INFO L208 MainTranslator]: Completed translation [2021-05-01 03:01:27,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 03:01:27 WrapperNode [2021-05-01 03:01:27,235 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-01 03:01:27,237 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-01 03:01:27,238 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-01 03:01:27,238 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-01 03:01:27,282 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 03:01:27" (1/1) ... [2021-05-01 03:01:27,282 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 03:01:27" (1/1) ... [2021-05-01 03:01:27,317 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 03:01:27" (1/1) ... [2021-05-01 03:01:27,317 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 03:01:27" (1/1) ... [2021-05-01 03:01:27,327 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 03:01:27" (1/1) ... [2021-05-01 03:01:27,337 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 03:01:27" (1/1) ... [2021-05-01 03:01:27,349 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 03:01:27" (1/1) ... [2021-05-01 03:01:27,354 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-01 03:01:27,356 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-01 03:01:27,357 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-01 03:01:27,357 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-01 03:01:27,358 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 03:01:27" (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 03:01:27,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-01 03:01:27,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-01 03:01:27,476 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-01 03:01:27,476 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-01 03:01:27,476 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-01 03:01:27,476 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-01 03:01:27,477 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-01 03:01:27,477 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-01 03:01:27,477 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-01 03:01:27,477 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-01 03:01:27,478 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-01 03:01:27,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-01 03:01:27,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-01 03:01:27,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-01 03:01:27,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-01 03:01:27,479 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-01 03:01:27,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-01 03:01:27,896 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-01 03:01:27,897 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-01 03:01:27,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 03:01:27 BoogieIcfgContainer [2021-05-01 03:01:27,899 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-01 03:01:27,900 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-01 03:01:27,900 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-01 03:01:27,902 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-01 03:01:27,907 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 03:01:27" (1/1) ... [2021-05-01 03:01:27,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 01.05 03:01:27 BasicIcfg [2021-05-01 03:01:27,949 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-01 03:01:27,965 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-01 03:01:27,965 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-01 03:01:27,971 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-01 03:01:27,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.05 03:01:26" (1/4) ... [2021-05-01 03:01:27,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2279bc0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 03:01:27, skipping insertion in model container [2021-05-01 03:01:27,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 03:01:27" (2/4) ... [2021-05-01 03:01:27,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2279bc0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 03:01:27, skipping insertion in model container [2021-05-01 03:01:27,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 03:01:27" (3/4) ... [2021-05-01 03:01:27,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2279bc0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 03:01:27, skipping insertion in model container [2021-05-01 03:01:27,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 01.05 03:01:27" (4/4) ... [2021-05-01 03:01:27,986 INFO L111 eAbstractionObserver]: Analyzing ICFG while_infinite_loop_1.cJordan [2021-05-01 03:01:27,994 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-01 03:01:28,007 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-01 03:01:28,034 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-01 03:01:28,073 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-01 03:01:28,073 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-01 03:01:28,074 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-01 03:01:28,074 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-01 03:01:28,074 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-01 03:01:28,074 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-01 03:01:28,074 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-01 03:01:28,074 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-01 03:01:28,103 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 10 states have (on average 1.4) internal successors, (14), 12 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-01 03:01:28,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-01 03:01:28,124 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 03:01:28,125 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 03:01:28,127 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 03:01:28,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 03:01:28,137 INFO L82 PathProgramCache]: Analyzing trace with hash 924096770, now seen corresponding path program 1 times [2021-05-01 03:01:28,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-01 03:01:28,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070951611] [2021-05-01 03:01:28,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 03:01:28,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 03:01:28,424 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:01:28,427 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:01:28,429 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:01:28,431 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:01:28,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 03:01:28,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 03:01:28,567 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:01:28,568 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:01:28,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 03:01:28,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-01 03:01:28,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070951611] [2021-05-01 03:01:28,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070951611] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 03:01:28,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 03:01:28,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-01 03:01:28,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341163912] [2021-05-01 03:01:28,580 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-01 03:01:28,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-01 03:01:28,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-01 03:01:28,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 03:01:28,618 INFO L87 Difference]: Start difference. First operand has 19 states, 10 states have (on average 1.4) internal successors, (14), 12 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) 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) [2021-05-01 03:01:28,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 03:01:28,711 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2021-05-01 03:01:28,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-01 03:01:28,717 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 [2021-05-01 03:01:28,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 03:01:28,730 INFO L225 Difference]: With dead ends: 14 [2021-05-01 03:01:28,730 INFO L226 Difference]: Without dead ends: 14 [2021-05-01 03:01:28,733 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 111.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 03:01:28,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-05-01 03:01:28,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-05-01 03:01:28,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 8 states have (on average 1.125) internal successors, (9), 9 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-01 03:01:28,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-05-01 03:01:28,777 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2021-05-01 03:01:28,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 03:01:28,778 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-05-01 03:01:28,778 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) [2021-05-01 03:01:28,779 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-05-01 03:01:28,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-01 03:01:28,780 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 03:01:28,781 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 03:01:28,781 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-01 03:01:28,782 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 03:01:28,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 03:01:28,783 INFO L82 PathProgramCache]: Analyzing trace with hash 925973603, now seen corresponding path program 1 times [2021-05-01 03:01:28,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-01 03:01:28,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021293998] [2021-05-01 03:01:28,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 03:01:28,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 03:01:28,922 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:01:28,923 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:01:28,929 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:01:28,930 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 03:01:28,941 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:01:28,942 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 03:01:28,956 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:01:28,958 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 03:01:29,008 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:01:29,009 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:01:29,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 03:01:29,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 03:01:29,100 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:01:29,101 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:01:29,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 03:01:29,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-01 03:01:29,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021293998] [2021-05-01 03:01:29,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021293998] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 03:01:29,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 03:01:29,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-01 03:01:29,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291114059] [2021-05-01 03:01:29,108 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-01 03:01:29,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-01 03:01:29,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-01 03:01:29,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-01 03:01:29,111 INFO L87 Difference]: Start difference. First operand 14 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) [2021-05-01 03:01:29,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 03:01:29,399 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2021-05-01 03:01:29,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-01 03:01:29,402 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 [2021-05-01 03:01:29,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 03:01:29,403 INFO L225 Difference]: With dead ends: 12 [2021-05-01 03:01:29,403 INFO L226 Difference]: Without dead ends: 0 [2021-05-01 03:01:29,404 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 331.5ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-01 03:01:29,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-01 03:01:29,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-01 03:01:29,406 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) [2021-05-01 03:01:29,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-01 03:01:29,406 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2021-05-01 03:01:29,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 03:01:29,407 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-01 03:01:29,407 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) [2021-05-01 03:01:29,407 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-01 03:01:29,408 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-01 03:01:29,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-01 03:01:29,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 03:01:29 BasicIcfg [2021-05-01 03:01:29,429 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-01 03:01:29,432 INFO L168 Benchmark]: Toolchain (without parser) took 2497.58 ms. Allocated memory was 180.4 MB in the beginning and 217.1 MB in the end (delta: 36.7 MB). Free memory was 144.8 MB in the beginning and 173.6 MB in the end (delta: -28.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2021-05-01 03:01:29,433 INFO L168 Benchmark]: CDTParser took 0.54 ms. Allocated memory is still 180.4 MB. Free memory is still 161.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 03:01:29,434 INFO L168 Benchmark]: CACSL2BoogieTranslator took 297.48 ms. Allocated memory is still 180.4 MB. Free memory was 144.5 MB in the beginning and 162.2 MB in the end (delta: -17.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-01 03:01:29,435 INFO L168 Benchmark]: Boogie Preprocessor took 117.60 ms. Allocated memory is still 180.4 MB. Free memory was 162.2 MB in the beginning and 163.2 MB in the end (delta: -996.4 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-01 03:01:29,438 INFO L168 Benchmark]: RCFGBuilder took 542.78 ms. Allocated memory is still 180.4 MB. Free memory was 163.2 MB in the beginning and 151.1 MB in the end (delta: 12.1 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-05-01 03:01:29,443 INFO L168 Benchmark]: IcfgTransformer took 62.06 ms. Allocated memory is still 180.4 MB. Free memory was 151.1 MB in the beginning and 149.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-01 03:01:29,444 INFO L168 Benchmark]: TraceAbstraction took 1464.51 ms. Allocated memory was 180.4 MB in the beginning and 217.1 MB in the end (delta: 36.7 MB). Free memory was 149.2 MB in the beginning and 173.6 MB in the end (delta: -24.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-01 03:01:29,446 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.54 ms. Allocated memory is still 180.4 MB. Free memory is still 161.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 297.48 ms. Allocated memory is still 180.4 MB. Free memory was 144.5 MB in the beginning and 162.2 MB in the end (delta: -17.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 117.60 ms. Allocated memory is still 180.4 MB. Free memory was 162.2 MB in the beginning and 163.2 MB in the end (delta: -996.4 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 542.78 ms. Allocated memory is still 180.4 MB. Free memory was 163.2 MB in the beginning and 151.1 MB in the end (delta: 12.1 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * IcfgTransformer took 62.06 ms. Allocated memory is still 180.4 MB. Free memory was 151.1 MB in the beginning and 149.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1464.51 ms. Allocated memory was 180.4 MB in the beginning and 217.1 MB in the end (delta: 36.7 MB). Free memory was 149.2 MB in the beginning and 173.6 MB in the end (delta: -24.4 MB). Peak memory consumption was 13.6 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, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1338.9ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 35.3ms, AutomataDifference: 440.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 16.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 20 SDtfs, 17 SDslu, 18 SDs, 0 SdLazy, 20 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 89.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 443.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred 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: 25.0ms AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 31.2ms SsaConstructionTime, 107.6ms SatisfiabilityAnalysisTime, 489.6ms InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 90 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...