/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/loops/lu.cmp.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 05:22:44,852 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 05:22:44,854 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 05:22:44,885 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 05:22:44,940 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 05:22:44,940 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 05:22:44,941 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 05:22:44,944 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 05:22:44,957 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 05:22:44,957 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 05:22:44,960 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 05:22:44,960 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 05:22:44,960 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 05:22:44,960 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 05:22:44,960 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 05:22:44,960 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 05:22:44,960 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 05:22:44,960 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 05:22:44,961 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 05:22:44,961 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 05:22:44,961 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 05:22:44,961 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 05:22:44,962 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 05:22:44,962 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 05:22:44,962 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 05:22:44,962 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 05:22:44,962 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 05:22:44,962 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 05:22:44,962 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 05:22:44,963 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 05:22:44,963 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 05:22:45,231 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 05:22:45,248 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 05:22:45,250 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 05:22:45,251 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 05:22:45,251 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 05:22:45,252 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/lu.cmp.c [2021-05-06 05:22:45,298 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd7176b0b/2e46b5ff89d948d1b0d00529ade571bf/FLAGff7706874 [2021-05-06 05:22:45,645 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 05:22:45,645 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/lu.cmp.c [2021-05-06 05:22:45,652 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd7176b0b/2e46b5ff89d948d1b0d00529ade571bf/FLAGff7706874 [2021-05-06 05:22:46,031 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd7176b0b/2e46b5ff89d948d1b0d00529ade571bf [2021-05-06 05:22:46,033 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 05:22:46,034 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 05:22:46,037 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 05:22:46,037 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 05:22:46,039 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 05:22:46,040 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 05:22:46" (1/1) ... [2021-05-06 05:22:46,040 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4970902c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:22:46, skipping insertion in model container [2021-05-06 05:22:46,041 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 05:22:46" (1/1) ... [2021-05-06 05:22:46,047 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 05:22:46,069 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 05:22:46,142 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/lu.cmp.c[318,331] [2021-05-06 05:22:46,185 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 05:22:46,191 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 05:22:46,197 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/lu.cmp.c[318,331] [2021-05-06 05:22:46,210 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 05:22:46,220 INFO L208 MainTranslator]: Completed translation [2021-05-06 05:22:46,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:22:46 WrapperNode [2021-05-06 05:22:46,221 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 05:22:46,222 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 05:22:46,222 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 05:22:46,222 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 05:22:46,266 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:22:46" (1/1) ... [2021-05-06 05:22:46,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:22:46" (1/1) ... [2021-05-06 05:22:46,281 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:22:46" (1/1) ... [2021-05-06 05:22:46,281 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:22:46" (1/1) ... [2021-05-06 05:22:46,296 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:22:46" (1/1) ... [2021-05-06 05:22:46,300 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:22:46" (1/1) ... [2021-05-06 05:22:46,302 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:22:46" (1/1) ... [2021-05-06 05:22:46,304 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 05:22:46,304 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 05:22:46,304 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 05:22:46,304 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 05:22:46,305 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:22:46" (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 [2021-05-06 05:22:46,369 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 05:22:46,369 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 05:22:46,369 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 05:22:46,369 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 05:22:46,369 INFO L138 BoogieDeclarations]: Found implementation of procedure fabs [2021-05-06 05:22:46,369 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 05:22:46,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ludcmp [2021-05-06 05:22:46,370 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 05:22:46,370 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 05:22:46,370 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 05:22:46,370 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 05:22:46,370 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 05:22:46,370 INFO L130 BoogieDeclarations]: Found specification of procedure ludcmp [2021-05-06 05:22:46,370 INFO L130 BoogieDeclarations]: Found specification of procedure fabs [2021-05-06 05:22:46,370 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 05:22:46,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-05-06 05:22:46,370 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-05-06 05:22:46,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 05:22:46,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 05:22:46,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 05:22:46,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 05:22:46,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 05:22:46,371 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 05:22:46,687 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 05:22:46,687 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-05-06 05:22:46,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 05:22:46 BoogieIcfgContainer [2021-05-06 05:22:46,688 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 05:22:46,689 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 05:22:46,689 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 05:22:46,689 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 05:22:46,695 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 05:22:46" (1/1) ... [2021-05-06 05:22:46,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 05:22:46 BasicIcfg [2021-05-06 05:22:46,709 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 05:22:46,709 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 05:22:46,710 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 05:22:46,711 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 05:22:46,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 05:22:46" (1/4) ... [2021-05-06 05:22:46,712 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1650b0e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 05:22:46, skipping insertion in model container [2021-05-06 05:22:46,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:22:46" (2/4) ... [2021-05-06 05:22:46,712 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1650b0e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 05:22:46, skipping insertion in model container [2021-05-06 05:22:46,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 05:22:46" (3/4) ... [2021-05-06 05:22:46,713 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1650b0e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 05:22:46, skipping insertion in model container [2021-05-06 05:22:46,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 05:22:46" (4/4) ... [2021-05-06 05:22:46,713 INFO L111 eAbstractionObserver]: Analyzing ICFG lu.cmp.cJordan [2021-05-06 05:22:46,717 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 05:22:46,719 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 05:22:46,730 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 05:22:46,742 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 05:22:46,742 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 05:22:46,742 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 05:22:46,742 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 05:22:46,742 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 05:22:46,742 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 05:22:46,742 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 05:22:46,742 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 05:22:46,752 INFO L276 IsEmpty]: Start isEmpty. Operand has 64 states, 52 states have (on average 1.5576923076923077) internal successors, (81), 53 states have internal predecessors, (81), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 05:22:46,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 05:22:46,757 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:22:46,757 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:22:46,757 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:22:46,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:22:46,761 INFO L82 PathProgramCache]: Analyzing trace with hash -708032411, now seen corresponding path program 1 times [2021-05-06 05:22:46,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:22:46,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696529282] [2021-05-06 05:22:46,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:22:46,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:22:46,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:22:46,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:22:47,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:22:47,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:22:47,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696529282] [2021-05-06 05:22:47,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696529282] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:22:47,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:22:47,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 05:22:47,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095475053] [2021-05-06 05:22:47,013 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 05:22:47,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:22:47,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 05:22:47,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 05:22:47,025 INFO L87 Difference]: Start difference. First operand has 64 states, 52 states have (on average 1.5576923076923077) internal successors, (81), 53 states have internal predecessors, (81), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2021-05-06 05:22:47,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:22:47,187 INFO L93 Difference]: Finished difference Result 69 states and 88 transitions. [2021-05-06 05:22:47,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 05:22:47,189 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 12 [2021-05-06 05:22:47,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:22:47,193 INFO L225 Difference]: With dead ends: 69 [2021-05-06 05:22:47,193 INFO L226 Difference]: Without dead ends: 24 [2021-05-06 05:22:47,194 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 67.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 05:22:47,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-06 05:22:47,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2021-05-06 05:22:47,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 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) [2021-05-06 05:22:47,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-05-06 05:22:47,214 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2021-05-06 05:22:47,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:22:47,215 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-05-06 05:22:47,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2021-05-06 05:22:47,215 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-05-06 05:22:47,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 05:22:47,215 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:22:47,215 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:22:47,215 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 05:22:47,216 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:22:47,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:22:47,216 INFO L82 PathProgramCache]: Analyzing trace with hash -707108890, now seen corresponding path program 1 times [2021-05-06 05:22:47,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:22:47,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566864398] [2021-05-06 05:22:47,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:22:47,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:22:47,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:22:47,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:22:47,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:22:47,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:22:47,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566864398] [2021-05-06 05:22:47,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566864398] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:22:47,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:22:47,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 05:22:47,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105625502] [2021-05-06 05:22:47,338 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 05:22:47,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:22:47,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 05:22:47,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 05:22:47,339 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-05-06 05:22:47,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:22:47,453 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2021-05-06 05:22:47,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 05:22:47,453 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 12 [2021-05-06 05:22:47,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:22:47,454 INFO L225 Difference]: With dead ends: 26 [2021-05-06 05:22:47,454 INFO L226 Difference]: Without dead ends: 26 [2021-05-06 05:22:47,455 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 98.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:22:47,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-06 05:22:47,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2021-05-06 05:22:47,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 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) [2021-05-06 05:22:47,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-05-06 05:22:47,461 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 12 [2021-05-06 05:22:47,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:22:47,462 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-05-06 05:22:47,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-05-06 05:22:47,462 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-05-06 05:22:47,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-06 05:22:47,463 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:22:47,463 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:22:47,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 05:22:47,465 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:22:47,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:22:47,466 INFO L82 PathProgramCache]: Analyzing trace with hash -740655430, now seen corresponding path program 1 times [2021-05-06 05:22:47,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:22:47,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376135149] [2021-05-06 05:22:47,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:22:47,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:22:47,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:22:47,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:22:47,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 05:22:47,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:22:47,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376135149] [2021-05-06 05:22:47,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376135149] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:22:47,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:22:47,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 05:22:47,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24878444] [2021-05-06 05:22:47,587 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 05:22:47,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:22:47,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 05:22:47,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:22:47,588 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2021-05-06 05:22:47,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:22:47,809 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-05-06 05:22:47,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 05:22:47,810 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 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 16 [2021-05-06 05:22:47,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:22:47,811 INFO L225 Difference]: With dead ends: 34 [2021-05-06 05:22:47,811 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 05:22:47,812 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 194.3ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 05:22:47,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 05:22:47,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-05-06 05:22:47,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 05:22:47,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-05-06 05:22:47,818 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 16 [2021-05-06 05:22:47,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:22:47,819 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-05-06 05:22:47,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2021-05-06 05:22:47,819 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-05-06 05:22:47,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 05:22:47,820 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:22:47,820 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:22:47,821 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 05:22:47,821 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:22:47,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:22:47,822 INFO L82 PathProgramCache]: Analyzing trace with hash 213602113, now seen corresponding path program 1 times [2021-05-06 05:22:47,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:22:47,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354139040] [2021-05-06 05:22:47,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:22:47,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:22:47,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:22:47,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:22:47,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 05:22:47,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:22:47,942 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-06 05:22:47,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:22:47,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354139040] [2021-05-06 05:22:47,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354139040] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:22:47,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533703772] [2021-05-06 05:22:47,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:22:48,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:22:48,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-06 05:22:48,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:22:48,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:22:48,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:22:48,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:22:48,163 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 05:22:48,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533703772] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:22:48,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 05:22:48,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-05-06 05:22:48,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255454131] [2021-05-06 05:22:48,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 05:22:48,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:22:48,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 05:22:48,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-06 05:22:48,165 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 8 states have internal predecessors, (43), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 05:22:48,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:22:48,514 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2021-05-06 05:22:48,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 05:22:48,514 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 8 states have internal predecessors, (43), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 29 [2021-05-06 05:22:48,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:22:48,516 INFO L225 Difference]: With dead ends: 68 [2021-05-06 05:22:48,516 INFO L226 Difference]: Without dead ends: 68 [2021-05-06 05:22:48,516 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 304.7ms TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-05-06 05:22:48,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-06 05:22:48,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 58. [2021-05-06 05:22:48,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 49 states have internal predecessors, (59), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 05:22:48,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2021-05-06 05:22:48,520 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 29 [2021-05-06 05:22:48,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:22:48,521 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2021-05-06 05:22:48,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 8 states have internal predecessors, (43), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 05:22:48,521 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2021-05-06 05:22:48,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-06 05:22:48,523 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:22:48,523 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:22:48,736 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:22:48,737 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:22:48,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:22:48,737 INFO L82 PathProgramCache]: Analyzing trace with hash -833587381, now seen corresponding path program 1 times [2021-05-06 05:22:48,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:22:48,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681306338] [2021-05-06 05:22:48,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:22:48,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:22:48,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:22:48,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:22:48,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-05-06 05:22:48,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:22:48,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-05-06 05:22:48,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:22:48,858 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 4 proven. 44 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-05-06 05:22:48,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:22:48,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681306338] [2021-05-06 05:22:48,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681306338] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:22:48,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13192213] [2021-05-06 05:22:48,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:22:48,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:22:48,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 05:22:48,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:22:48,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:22:48,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:22:49,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:22:49,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:22:49,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:22:49,105 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 44 proven. 6 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-05-06 05:22:49,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13192213] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:22:49,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 05:22:49,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-05-06 05:22:49,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547743763] [2021-05-06 05:22:49,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 05:22:49,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:22:49,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 05:22:49,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 05:22:49,107 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 9 states have internal predecessors, (49), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 05:22:49,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:22:49,383 INFO L93 Difference]: Finished difference Result 84 states and 99 transitions. [2021-05-06 05:22:49,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 05:22:49,385 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 9 states have internal predecessors, (49), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 54 [2021-05-06 05:22:49,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:22:49,385 INFO L225 Difference]: With dead ends: 84 [2021-05-06 05:22:49,385 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 05:22:49,385 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 272.6ms TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2021-05-06 05:22:49,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 05:22:49,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 05:22:49,386 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) [2021-05-06 05:22:49,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 05:22:49,386 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 54 [2021-05-06 05:22:49,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:22:49,386 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 05:22:49,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 9 states have internal predecessors, (49), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 05:22:49,386 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 05:22:49,386 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 05:22:49,587 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:22:49,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 05:22:49 BasicIcfg [2021-05-06 05:22:49,590 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 05:22:49,591 INFO L168 Benchmark]: Toolchain (without parser) took 3556.52 ms. Allocated memory was 195.0 MB in the beginning and 248.5 MB in the end (delta: 53.5 MB). Free memory was 160.5 MB in the beginning and 219.1 MB in the end (delta: -58.6 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 05:22:49,591 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 195.0 MB. Free memory is still 176.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 05:22:49,591 INFO L168 Benchmark]: CACSL2BoogieTranslator took 184.48 ms. Allocated memory is still 195.0 MB. Free memory was 160.3 MB in the beginning and 148.5 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-05-06 05:22:49,591 INFO L168 Benchmark]: Boogie Preprocessor took 81.94 ms. Allocated memory is still 195.0 MB. Free memory was 148.5 MB in the beginning and 176.5 MB in the end (delta: -28.0 MB). Peak memory consumption was 4.7 MB. Max. memory is 8.0 GB. [2021-05-06 05:22:49,591 INFO L168 Benchmark]: RCFGBuilder took 384.05 ms. Allocated memory is still 195.0 MB. Free memory was 176.1 MB in the beginning and 147.8 MB in the end (delta: 28.3 MB). Peak memory consumption was 28.3 MB. Max. memory is 8.0 GB. [2021-05-06 05:22:49,591 INFO L168 Benchmark]: IcfgTransformer took 19.91 ms. Allocated memory is still 195.0 MB. Free memory was 147.8 MB in the beginning and 146.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 05:22:49,591 INFO L168 Benchmark]: TraceAbstraction took 2880.70 ms. Allocated memory was 195.0 MB in the beginning and 248.5 MB in the end (delta: 53.5 MB). Free memory was 145.7 MB in the beginning and 219.1 MB in the end (delta: -73.4 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 05:22:49,592 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 195.0 MB. Free memory is still 176.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 184.48 ms. Allocated memory is still 195.0 MB. Free memory was 160.3 MB in the beginning and 148.5 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 81.94 ms. Allocated memory is still 195.0 MB. Free memory was 148.5 MB in the beginning and 176.5 MB in the end (delta: -28.0 MB). Peak memory consumption was 4.7 MB. Max. memory is 8.0 GB. * RCFGBuilder took 384.05 ms. Allocated memory is still 195.0 MB. Free memory was 176.1 MB in the beginning and 147.8 MB in the end (delta: 28.3 MB). Peak memory consumption was 28.3 MB. Max. memory is 8.0 GB. * IcfgTransformer took 19.91 ms. Allocated memory is still 195.0 MB. Free memory was 147.8 MB in the beginning and 146.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2880.70 ms. Allocated memory was 195.0 MB in the beginning and 248.5 MB in the end (delta: 53.5 MB). Free memory was 145.7 MB in the beginning and 219.1 MB in the end (delta: -73.4 MB). There was no memory consumed. 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 6 procedures, 64 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2847.1ms, OverallIterations: 5, TraceHistogramMax: 6, EmptinessCheckTime: 11.8ms, AutomataDifference: 1152.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 123 SDtfs, 187 SDslu, 120 SDs, 0 SdLazy, 353 SolverSat, 56 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 333.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 148 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 938.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=64occurred in iteration=0, InterpolantAutomatonStates: 47, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 29.4ms AutomataMinimizationTime, 5 MinimizatonAttempts, 21 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 54.2ms SsaConstructionTime, 169.4ms SatisfiabilityAnalysisTime, 821.5ms InterpolantComputationTime, 206 NumberOfCodeBlocks, 206 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 199 ConstructedInterpolants, 0 QuantifiedInterpolants, 688 SizeOfPredicates, 4 NumberOfNonLiveVariables, 422 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 161/221 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...