/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/terminator_02-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 17:49:09,114 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 17:49:09,117 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 17:49:09,162 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 17:49:09,184 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 17:49:09,186 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 17:49:09,187 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 17:49:09,189 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 17:49:09,191 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 17:49:09,192 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 17:49:09,194 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 17:49:09,199 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 17:49:09,200 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 17:49:09,201 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 17:49:09,202 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 17:49:09,204 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 17:49:09,211 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 17:49:09,239 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 17:49:09,240 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 17:49:09,240 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 17:49:09,242 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 17:49:09,254 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 17:49:09,254 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 17:49:09,257 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 17:49:09,257 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 17:49:09,258 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 17:49:09,258 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 17:49:09,258 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 17:49:09,258 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 17:49:09,258 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 17:49:09,258 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 17:49:09,259 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 17:49:09,259 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 17:49:09,260 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 17:49:09,260 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 17:49:09,260 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 17:49:09,260 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 17:49:09,260 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 17:49:09,260 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 17:49:09,261 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 17:49:09,261 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 17:49:09,261 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 17:49:09,262 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 17:49:09,262 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 17:49:09,630 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 17:49:09,657 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 17:49:09,659 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 17:49:09,660 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 17:49:09,662 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 17:49:09,662 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/terminator_02-1.c [2021-05-02 17:49:09,748 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a82c50527/4224f923686445d9b996f211e244c98e/FLAG4b9c90201 [2021-05-02 17:49:10,199 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 17:49:10,200 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/terminator_02-1.c [2021-05-02 17:49:10,205 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a82c50527/4224f923686445d9b996f211e244c98e/FLAG4b9c90201 [2021-05-02 17:49:10,672 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a82c50527/4224f923686445d9b996f211e244c98e [2021-05-02 17:49:10,675 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 17:49:10,677 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 17:49:10,679 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 17:49:10,679 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 17:49:10,683 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 17:49:10,683 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:49:10" (1/1) ... [2021-05-02 17:49:10,684 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a25204e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:49:10, skipping insertion in model container [2021-05-02 17:49:10,685 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:49:10" (1/1) ... [2021-05-02 17:49:10,691 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 17:49:10,704 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 17:49:10,810 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/terminator_02-1.c[327,340] [2021-05-02 17:49:10,820 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:49:10,827 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 17:49:10,837 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/terminator_02-1.c[327,340] [2021-05-02 17:49:10,840 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:49:10,852 INFO L208 MainTranslator]: Completed translation [2021-05-02 17:49:10,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:49:10 WrapperNode [2021-05-02 17:49:10,853 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 17:49:10,854 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 17:49:10,854 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 17:49:10,854 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 17:49:10,862 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:49:10" (1/1) ... [2021-05-02 17:49:10,863 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:49:10" (1/1) ... [2021-05-02 17:49:10,868 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:49:10" (1/1) ... [2021-05-02 17:49:10,868 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:49:10" (1/1) ... [2021-05-02 17:49:10,872 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:49:10" (1/1) ... [2021-05-02 17:49:10,875 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:49:10" (1/1) ... [2021-05-02 17:49:10,876 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:49:10" (1/1) ... [2021-05-02 17:49:10,881 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 17:49:10,882 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 17:49:10,882 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 17:49:10,883 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 17:49:10,883 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:49:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 17:49:10,999 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 17:49:11,000 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 17:49:11,000 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 17:49:11,000 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 17:49:11,000 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 17:49:11,000 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 17:49:11,000 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 17:49:11,000 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 17:49:11,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 17:49:11,001 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 17:49:11,001 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 17:49:11,001 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-05-02 17:49:11,001 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 17:49:11,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 17:49:11,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 17:49:11,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 17:49:11,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 17:49:11,002 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 17:49:11,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 17:49:11,294 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 17:49:11,294 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 17:49:11,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:49:11 BoogieIcfgContainer [2021-05-02 17:49:11,296 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 17:49:11,297 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 17:49:11,297 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 17:49:11,298 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 17:49:11,300 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:49:11" (1/1) ... [2021-05-02 17:49:11,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 05:49:11 BasicIcfg [2021-05-02 17:49:11,331 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 17:49:11,353 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 17:49:11,353 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 17:49:11,356 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 17:49:11,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 05:49:10" (1/4) ... [2021-05-02 17:49:11,357 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c6c77e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:49:11, skipping insertion in model container [2021-05-02 17:49:11,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:49:10" (2/4) ... [2021-05-02 17:49:11,357 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c6c77e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:49:11, skipping insertion in model container [2021-05-02 17:49:11,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:49:11" (3/4) ... [2021-05-02 17:49:11,358 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c6c77e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 05:49:11, skipping insertion in model container [2021-05-02 17:49:11,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 05:49:11" (4/4) ... [2021-05-02 17:49:11,359 INFO L111 eAbstractionObserver]: Analyzing ICFG terminator_02-1.cJordan [2021-05-02 17:49:11,363 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 17:49:11,367 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 17:49:11,381 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 17:49:11,398 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 17:49:11,398 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 17:49:11,398 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 17:49:11,398 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 17:49:11,398 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 17:49:11,399 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 17:49:11,399 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 17:49:11,399 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 17:49:11,416 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 17:49:11,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 17:49:11,423 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:49:11,424 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:49:11,424 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:49:11,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:49:11,433 INFO L82 PathProgramCache]: Analyzing trace with hash -154368955, now seen corresponding path program 1 times [2021-05-02 17:49:11,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:49:11,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509403672] [2021-05-02 17:49:11,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:49:11,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:49:11,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:49:11,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:49:11,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:49:11,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:49:11,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509403672] [2021-05-02 17:49:11,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509403672] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:49:11,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:49:11,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 17:49:11,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849703408] [2021-05-02 17:49:11,689 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 17:49:11,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:49:11,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 17:49:11,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:49:11,700 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:49:11,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:49:11,736 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2021-05-02 17:49:11,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 17:49:11,738 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 17:49:11,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:49:11,744 INFO L225 Difference]: With dead ends: 20 [2021-05-02 17:49:11,744 INFO L226 Difference]: Without dead ends: 13 [2021-05-02 17:49:11,746 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 68.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:49:11,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-05-02 17:49:11,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-05-02 17:49:11,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:49:11,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-05-02 17:49:11,781 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2021-05-02 17:49:11,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:49:11,782 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-05-02 17:49:11,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:49:11,787 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-05-02 17:49:11,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 17:49:11,789 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:49:11,789 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:49:11,789 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 17:49:11,789 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:49:11,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:49:11,790 INFO L82 PathProgramCache]: Analyzing trace with hash -153445434, now seen corresponding path program 1 times [2021-05-02 17:49:11,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:49:11,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995935430] [2021-05-02 17:49:11,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:49:11,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 17:49:11,837 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 17:49:11,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 17:49:11,876 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 17:49:11,906 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-02 17:49:11,907 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 17:49:11,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 17:49:11,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 05:49:11 BasicIcfg [2021-05-02 17:49:11,934 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 17:49:11,937 INFO L168 Benchmark]: Toolchain (without parser) took 1258.39 ms. Allocated memory is still 198.2 MB. Free memory was 164.3 MB in the beginning and 139.5 MB in the end (delta: 24.8 MB). Peak memory consumption was 24.3 MB. Max. memory is 8.0 GB. [2021-05-02 17:49:11,938 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 198.2 MB. Free memory is still 180.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 17:49:11,939 INFO L168 Benchmark]: CACSL2BoogieTranslator took 174.23 ms. Allocated memory is still 198.2 MB. Free memory was 164.1 MB in the beginning and 154.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 17:49:11,940 INFO L168 Benchmark]: Boogie Preprocessor took 27.80 ms. Allocated memory is still 198.2 MB. Free memory was 154.8 MB in the beginning and 153.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 17:49:11,941 INFO L168 Benchmark]: RCFGBuilder took 413.76 ms. Allocated memory is still 198.2 MB. Free memory was 153.2 MB in the beginning and 170.1 MB in the end (delta: -16.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. [2021-05-02 17:49:11,942 INFO L168 Benchmark]: IcfgTransformer took 34.04 ms. Allocated memory is still 198.2 MB. Free memory was 169.9 MB in the beginning and 168.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 17:49:11,943 INFO L168 Benchmark]: TraceAbstraction took 582.06 ms. Allocated memory is still 198.2 MB. Free memory was 168.1 MB in the beginning and 139.5 MB in the end (delta: 28.6 MB). Peak memory consumption was 28.3 MB. Max. memory is 8.0 GB. [2021-05-02 17:49:11,949 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 198.2 MB. Free memory is still 180.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 174.23 ms. Allocated memory is still 198.2 MB. Free memory was 164.1 MB in the beginning and 154.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 27.80 ms. Allocated memory is still 198.2 MB. Free memory was 154.8 MB in the beginning and 153.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 413.76 ms. Allocated memory is still 198.2 MB. Free memory was 153.2 MB in the beginning and 170.1 MB in the end (delta: -16.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. * IcfgTransformer took 34.04 ms. Allocated memory is still 198.2 MB. Free memory was 169.9 MB in the beginning and 168.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 582.06 ms. Allocated memory is still 198.2 MB. Free memory was 168.1 MB in the beginning and 139.5 MB in the end (delta: 28.6 MB). Peak memory consumption was 28.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L16] int x=__VERIFIER_nondet_int(); [L17] int y=__VERIFIER_nondet_int(); [L18] int z=__VERIFIER_nondet_int(); [L20] COND FALSE !(x<100 && 100