/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loop-invgen/MADWiFi-encode_ie_ok.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 05:52:22,873 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 05:52:22,875 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 05:52:22,916 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 05:52:22,916 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 05:52:22,919 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 05:52:22,922 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 05:52:22,927 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 05:52:22,929 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 05:52:22,933 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 05:52:22,934 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 05:52:22,935 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2021-05-06 05:52:22,971 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 05:52:22,972 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 05:52:22,981 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 05:52:22,982 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 05:52:22,991 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 05:52:22,991 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 05:52:22,992 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 05:52:22,992 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 05:52:22,993 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 05:52:22,993 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 05:52:22,993 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 05:52:22,993 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 05:52:22,993 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 05:52:22,994 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 05:52:22,994 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 05:52:22,994 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 05:52:22,994 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 05:52:22,994 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 05:52:22,994 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 05:52:22,995 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 05:52:22,995 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 05:52:22,995 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 05:52:22,995 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 05:52:22,995 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 05:52:22,995 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 05:52:22,996 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 05:52:22,997 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 05:52:23,319 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 05:52:23,335 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 05:52:23,338 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 05:52:23,338 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 05:52:23,339 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 05:52:23,340 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/MADWiFi-encode_ie_ok.i [2021-05-06 05:52:23,387 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1680a5921/ae1337542a2b4673abe8667ad25fd22f/FLAG22858f7e2 [2021-05-06 05:52:24,074 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 05:52:24,075 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/MADWiFi-encode_ie_ok.i [2021-05-06 05:52:24,094 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1680a5921/ae1337542a2b4673abe8667ad25fd22f/FLAG22858f7e2 [2021-05-06 05:52:24,421 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1680a5921/ae1337542a2b4673abe8667ad25fd22f [2021-05-06 05:52:24,423 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 05:52:24,425 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 05:52:24,429 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 05:52:24,429 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 05:52:24,433 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 05:52:24,434 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 05:52:24" (1/1) ... [2021-05-06 05:52:24,435 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@180cf7a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:52:24, skipping insertion in model container [2021-05-06 05:52:24,435 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 05:52:24" (1/1) ... [2021-05-06 05:52:24,441 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 05:52:24,454 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 05:52:24,596 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/MADWiFi-encode_ie_ok.i[893,906] [2021-05-06 05:52:24,626 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 05:52:24,633 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 05:52:24,658 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/MADWiFi-encode_ie_ok.i[893,906] [2021-05-06 05:52:24,667 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 05:52:24,694 INFO L208 MainTranslator]: Completed translation [2021-05-06 05:52:24,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:52:24 WrapperNode [2021-05-06 05:52:24,695 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 05:52:24,695 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 05:52:24,696 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 05:52:24,698 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 05:52:24,706 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:52:24" (1/1) ... [2021-05-06 05:52:24,706 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:52:24" (1/1) ... [2021-05-06 05:52:24,712 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:52:24" (1/1) ... [2021-05-06 05:52:24,712 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:52:24" (1/1) ... [2021-05-06 05:52:24,726 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:52:24" (1/1) ... [2021-05-06 05:52:24,732 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:52:24" (1/1) ... [2021-05-06 05:52:24,737 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:52:24" (1/1) ... [2021-05-06 05:52:24,738 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 05:52:24,739 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 05:52:24,739 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 05:52:24,740 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 05:52:24,740 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:52:24" (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 05:52:24,806 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 05:52:24,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 05:52:24,807 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 05:52:24,807 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 05:52:24,807 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 05:52:24,808 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 05:52:24,808 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 05:52:24,808 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 05:52:24,808 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-06 05:52:24,809 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-06 05:52:24,809 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 05:52:24,809 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 05:52:24,810 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 05:52:24,810 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 05:52:24,811 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 05:52:24,811 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 05:52:24,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 05:52:24,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 05:52:24,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 05:52:24,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 05:52:24,814 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 05:52:24,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 05:52:25,008 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 05:52:25,009 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 05:52:25,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 05:52:25 BoogieIcfgContainer [2021-05-06 05:52:25,010 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 05:52:25,011 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 05:52:25,011 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 05:52:25,012 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 05:52:25,014 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 05:52:25" (1/1) ... [2021-05-06 05:52:25,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 05:52:25 BasicIcfg [2021-05-06 05:52:25,034 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 05:52:25,035 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 05:52:25,035 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 05:52:25,038 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 05:52:25,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 05:52:24" (1/4) ... [2021-05-06 05:52:25,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@210dfa08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 05:52:25, skipping insertion in model container [2021-05-06 05:52:25,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:52:24" (2/4) ... [2021-05-06 05:52:25,039 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@210dfa08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 05:52:25, skipping insertion in model container [2021-05-06 05:52:25,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 05:52:25" (3/4) ... [2021-05-06 05:52:25,039 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@210dfa08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 05:52:25, skipping insertion in model container [2021-05-06 05:52:25,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 05:52:25" (4/4) ... [2021-05-06 05:52:25,040 INFO L111 eAbstractionObserver]: Analyzing ICFG MADWiFi-encode_ie_ok.iJordan [2021-05-06 05:52:25,061 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 05:52:25,064 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 05:52:25,095 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 05:52:25,116 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 05:52:25,116 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 05:52:25,116 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 05:52:25,116 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 05:52:25,116 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 05:52:25,116 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 05:52:25,116 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 05:52:25,116 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 05:52:25,157 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 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) [2021-05-06 05:52:25,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-06 05:52:25,163 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:52:25,163 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:52:25,164 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:52:25,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:52:25,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1231819666, now seen corresponding path program 1 times [2021-05-06 05:52:25,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:52:25,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39355584] [2021-05-06 05:52:25,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:52:25,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:25,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:52:25,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:25,450 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 05:52:25,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:52:25,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39355584] [2021-05-06 05:52:25,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39355584] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:52:25,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:52:25,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-06 05:52:25,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157124748] [2021-05-06 05:52:25,455 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 05:52:25,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:52:25,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 05:52:25,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:52:25,467 INFO L87 Difference]: Start difference. First operand has 29 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 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 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 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 05:52:25,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:52:25,815 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2021-05-06 05:52:25,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 05:52:25,817 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 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 19 [2021-05-06 05:52:25,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:52:25,823 INFO L225 Difference]: With dead ends: 37 [2021-05-06 05:52:25,823 INFO L226 Difference]: Without dead ends: 29 [2021-05-06 05:52:25,827 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 173.4ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-05-06 05:52:25,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-06 05:52:25,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-06 05:52:25,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 05:52:25,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2021-05-06 05:52:25,856 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 19 [2021-05-06 05:52:25,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:52:25,857 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2021-05-06 05:52:25,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 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 05:52:25,857 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2021-05-06 05:52:25,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-06 05:52:25,858 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:52:25,858 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:52:25,859 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 05:52:25,859 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:52:25,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:52:25,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1598286936, now seen corresponding path program 1 times [2021-05-06 05:52:25,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:52:25,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684471850] [2021-05-06 05:52:25,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:52:25,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:25,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:52:25,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:25,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-06 05:52:25,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:25,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:52:25,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:52:25,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684471850] [2021-05-06 05:52:25,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684471850] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:52:25,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:52:25,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-06 05:52:25,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188863244] [2021-05-06 05:52:25,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 05:52:25,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:52:26,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 05:52:26,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:52:26,000 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 05:52:26,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:52:26,232 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2021-05-06 05:52:26,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 05:52:26,233 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2021-05-06 05:52:26,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:52:26,235 INFO L225 Difference]: With dead ends: 37 [2021-05-06 05:52:26,235 INFO L226 Difference]: Without dead ends: 37 [2021-05-06 05:52:26,236 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 142.9ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-05-06 05:52:26,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-06 05:52:26,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2021-05-06 05:52:26,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 25 states have (on average 1.04) internal successors, (26), 26 states have internal predecessors, (26), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 05:52:26,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-05-06 05:52:26,248 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 24 [2021-05-06 05:52:26,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:52:26,249 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-05-06 05:52:26,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 05:52:26,249 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-05-06 05:52:26,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 05:52:26,252 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:52:26,253 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:52:26,257 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 05:52:26,257 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:52:26,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:52:26,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1081273981, now seen corresponding path program 1 times [2021-05-06 05:52:26,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:52:26,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941026101] [2021-05-06 05:52:26,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:52:26,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:26,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:52:26,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:26,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-06 05:52:26,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:26,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-05-06 05:52:26,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:26,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-05-06 05:52:26,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:26,472 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 05:52:26,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:52:26,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941026101] [2021-05-06 05:52:26,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941026101] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:52:26,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995284532] [2021-05-06 05:52:26,473 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 05:52:26,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:26,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 05:52:26,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:52:26,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:26,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:26,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:26,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:26,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:26,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:26,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:26,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:26,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:26,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:26,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:26,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:26,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:26,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:26,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:26,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:26,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:26,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:26,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:26,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:26,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:26,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:26,898 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 05:52:26,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995284532] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:52:26,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 05:52:26,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-05-06 05:52:26,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699851693] [2021-05-06 05:52:26,899 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 05:52:26,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:52:26,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 05:52:26,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-05-06 05:52:26,900 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-06 05:52:27,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:52:27,319 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2021-05-06 05:52:27,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 05:52:27,320 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 37 [2021-05-06 05:52:27,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:52:27,322 INFO L225 Difference]: With dead ends: 46 [2021-05-06 05:52:27,322 INFO L226 Difference]: Without dead ends: 46 [2021-05-06 05:52:27,322 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 409.4ms TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-05-06 05:52:27,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-06 05:52:27,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-05-06 05:52:27,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.032258064516129) internal successors, (32), 32 states have internal predecessors, (32), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 05:52:27,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-05-06 05:52:27,336 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 37 [2021-05-06 05:52:27,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:52:27,336 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-05-06 05:52:27,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-06 05:52:27,337 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-05-06 05:52:27,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 05:52:27,340 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:52:27,340 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:52:27,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-06 05:52:27,568 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:52:27,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:52:27,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1682264184, now seen corresponding path program 2 times [2021-05-06 05:52:27,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:52:27,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403231799] [2021-05-06 05:52:27,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:52:27,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:27,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:52:27,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:27,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-06 05:52:27,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:27,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-05-06 05:52:27,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:27,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-05-06 05:52:27,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:27,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-05-06 05:52:27,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:27,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-05-06 05:52:27,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:52:27,794 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-05-06 05:52:27,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:52:27,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403231799] [2021-05-06 05:52:27,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403231799] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:52:27,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489878194] [2021-05-06 05:52:27,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 05:52:27,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 05:52:27,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:52:27,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 05:52:27,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:52:27,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:27,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:27,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:27,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:27,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:27,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:27,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:27,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:27,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:27,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:27,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:27,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:27,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:27,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:28,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:28,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:28,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:28,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:28,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:28,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:28,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:28,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:28,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:28,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:28,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:28,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:28,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:28,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:28,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:28,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:28,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:28,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:28,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:28,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:52:28,173 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 05:52:28,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489878194] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:52:28,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 05:52:28,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-06 05:52:28,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085249755] [2021-05-06 05:52:28,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 05:52:28,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:52:28,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 05:52:28,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-05-06 05:52:28,174 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 6 states have call successors, (14), 4 states have call predecessors, (14), 1 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2021-05-06 05:52:28,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:52:28,779 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2021-05-06 05:52:28,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 05:52:28,780 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 6 states have call successors, (14), 4 states have call predecessors, (14), 1 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 50 [2021-05-06 05:52:28,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:52:28,780 INFO L225 Difference]: With dead ends: 49 [2021-05-06 05:52:28,781 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 05:52:28,781 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 527.7ms TimeCoverageRelationStatistics Valid=187, Invalid=869, Unknown=0, NotChecked=0, Total=1056 [2021-05-06 05:52:28,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 05:52:28,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 05:52:28,782 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 05:52:28,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 05:52:28,782 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 50 [2021-05-06 05:52:28,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:52:28,782 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 05:52:28,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 6 states have call successors, (14), 4 states have call predecessors, (14), 1 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2021-05-06 05:52:28,782 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 05:52:28,782 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 05:52:28,996 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:52:29,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 05:52:29 BasicIcfg [2021-05-06 05:52:29,000 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 05:52:29,001 INFO L168 Benchmark]: Toolchain (without parser) took 4575.78 ms. Allocated memory was 216.0 MB in the beginning and 260.0 MB in the end (delta: 44.0 MB). Free memory was 181.3 MB in the beginning and 165.3 MB in the end (delta: 15.9 MB). Peak memory consumption was 60.5 MB. Max. memory is 8.0 GB. [2021-05-06 05:52:29,001 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 216.0 MB. Free memory is still 197.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 05:52:29,001 INFO L168 Benchmark]: CACSL2BoogieTranslator took 265.73 ms. Allocated memory is still 216.0 MB. Free memory was 181.1 MB in the beginning and 199.5 MB in the end (delta: -18.4 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. [2021-05-06 05:52:29,001 INFO L168 Benchmark]: Boogie Preprocessor took 43.09 ms. Allocated memory is still 216.0 MB. Free memory was 199.5 MB in the beginning and 198.1 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 05:52:29,001 INFO L168 Benchmark]: RCFGBuilder took 270.87 ms. Allocated memory is still 216.0 MB. Free memory was 198.1 MB in the beginning and 181.7 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-06 05:52:29,002 INFO L168 Benchmark]: IcfgTransformer took 23.30 ms. Allocated memory is still 216.0 MB. Free memory was 181.7 MB in the beginning and 180.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 05:52:29,002 INFO L168 Benchmark]: TraceAbstraction took 3965.11 ms. Allocated memory was 216.0 MB in the beginning and 260.0 MB in the end (delta: 44.0 MB). Free memory was 179.9 MB in the beginning and 165.3 MB in the end (delta: 14.6 MB). Peak memory consumption was 59.3 MB. Max. memory is 8.0 GB. [2021-05-06 05:52:29,002 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 216.0 MB. Free memory is still 197.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 265.73 ms. Allocated memory is still 216.0 MB. Free memory was 181.1 MB in the beginning and 199.5 MB in the end (delta: -18.4 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 43.09 ms. Allocated memory is still 216.0 MB. Free memory was 199.5 MB in the beginning and 198.1 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 8.0 GB. * RCFGBuilder took 270.87 ms. Allocated memory is still 216.0 MB. Free memory was 198.1 MB in the beginning and 181.7 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * IcfgTransformer took 23.30 ms. Allocated memory is still 216.0 MB. Free memory was 181.7 MB in the beginning and 180.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3965.11 ms. Allocated memory was 216.0 MB in the beginning and 260.0 MB in the end (delta: 44.0 MB). Free memory was 179.9 MB in the beginning and 165.3 MB in the end (delta: 14.6 MB). Peak memory consumption was 59.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 19]: 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, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3883.3ms, OverallIterations: 4, TraceHistogramMax: 6, EmptinessCheckTime: 30.2ms, AutomataDifference: 1634.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 23.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 97 SDtfs, 140 SDslu, 187 SDs, 0 SdLazy, 657 SolverSat, 114 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 557.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 178 GetRequests, 102 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 1253.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=3, InterpolantAutomatonStates: 46, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 44.5ms AutomataMinimizationTime, 4 MinimizatonAttempts, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 47.2ms SsaConstructionTime, 179.8ms SatisfiabilityAnalysisTime, 1286.4ms InterpolantComputationTime, 217 NumberOfCodeBlocks, 217 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 211 ConstructedInterpolants, 0 QuantifiedInterpolants, 778 SizeOfPredicates, 10 NumberOfNonLiveVariables, 286 ConjunctsInSsa, 24 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 139/166 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...