/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-lit/gj2007b.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 18:19:42,715 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 18:19:42,717 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 18:19:42,749 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 18:19:42,750 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 18:19:42,753 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 18:19:42,754 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 18:19:42,759 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 18:19:42,761 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 18:19:42,764 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 18:19:42,765 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 18:19:42,766 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 18:19:42,766 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 18:19:42,768 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 18:19:42,769 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 18:19:42,770 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 18:19:42,774 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 18:19:42,775 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 18:19:42,777 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 18:19:42,781 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 18:19:42,782 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 18:19:42,783 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 18:19:42,793 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 18:19:42,795 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 18:19:42,799 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 18:19:42,817 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 18:19:42,818 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 18:19:42,818 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 18:19:42,822 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 18:19:42,836 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 18:19:42,837 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 18:19:42,839 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 18:19:42,839 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 18:19:42,839 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 18:19:42,839 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 18:19:42,840 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 18:19:42,840 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 18:19:42,840 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 18:19:42,840 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 18:19:42,841 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 18:19:42,841 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 18:19:42,841 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 18:19:42,841 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 18:19:42,841 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 18:19:42,841 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 18:19:42,841 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 18:19:42,841 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 18:19:42,841 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 18:19:42,842 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 18:19:42,842 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 18:19:42,843 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 18:19:42,843 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 18:19:43,162 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 18:19:43,179 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 18:19:43,181 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 18:19:43,182 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 18:19:43,183 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 18:19:43,183 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gj2007b.i [2021-05-02 18:19:43,242 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e8d6ecec/ed6af00d949441a1bb8d4cd4a311ade6/FLAG307e29e93 [2021-05-02 18:19:43,628 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 18:19:43,629 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007b.i [2021-05-02 18:19:43,634 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e8d6ecec/ed6af00d949441a1bb8d4cd4a311ade6/FLAG307e29e93 [2021-05-02 18:19:43,650 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e8d6ecec/ed6af00d949441a1bb8d4cd4a311ade6 [2021-05-02 18:19:43,652 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 18:19:43,654 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 18:19:43,659 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 18:19:43,659 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 18:19:43,663 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 18:19:43,663 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 06:19:43" (1/1) ... [2021-05-02 18:19:43,664 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69d00027 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:19:43, skipping insertion in model container [2021-05-02 18:19:43,664 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 06:19:43" (1/1) ... [2021-05-02 18:19:43,669 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 18:19:43,681 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 18:19:43,812 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-lit/gj2007b.i[895,908] [2021-05-02 18:19:43,824 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 18:19:43,831 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 18:19:43,849 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-lit/gj2007b.i[895,908] [2021-05-02 18:19:43,853 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 18:19:43,881 INFO L208 MainTranslator]: Completed translation [2021-05-02 18:19:43,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:19:43 WrapperNode [2021-05-02 18:19:43,882 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 18:19:43,883 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 18:19:43,883 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 18:19:43,883 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 18:19:43,892 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:19:43" (1/1) ... [2021-05-02 18:19:43,892 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:19:43" (1/1) ... [2021-05-02 18:19:43,898 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:19:43" (1/1) ... [2021-05-02 18:19:43,898 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:19:43" (1/1) ... [2021-05-02 18:19:43,910 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:19:43" (1/1) ... [2021-05-02 18:19:43,913 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:19:43" (1/1) ... [2021-05-02 18:19:43,915 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:19:43" (1/1) ... [2021-05-02 18:19:43,921 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 18:19:43,923 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 18:19:43,923 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 18:19:43,923 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 18:19:43,924 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:19:43" (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 18:19:43,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 18:19:43,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 18:19:43,984 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 18:19:43,984 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 18:19:43,984 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 18:19:43,985 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 18:19:43,985 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 18:19:43,985 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 18:19:43,985 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 18:19:43,985 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 18:19:43,985 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 18:19:43,985 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 18:19:43,986 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 18:19:43,986 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 18:19:43,986 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 18:19:43,986 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 18:19:43,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 18:19:43,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 18:19:43,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 18:19:43,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 18:19:43,987 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 18:19:43,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 18:19:44,223 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 18:19:44,230 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 18:19:44,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:19:44 BoogieIcfgContainer [2021-05-02 18:19:44,232 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 18:19:44,234 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 18:19:44,234 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 18:19:44,235 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 18:19:44,237 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:19:44" (1/1) ... [2021-05-02 18:19:44,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 06:19:44 BasicIcfg [2021-05-02 18:19:44,266 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 18:19:44,267 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 18:19:44,267 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 18:19:44,269 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 18:19:44,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 06:19:43" (1/4) ... [2021-05-02 18:19:44,274 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4df84e78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 06:19:44, skipping insertion in model container [2021-05-02 18:19:44,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:19:43" (2/4) ... [2021-05-02 18:19:44,274 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4df84e78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 06:19:44, skipping insertion in model container [2021-05-02 18:19:44,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:19:44" (3/4) ... [2021-05-02 18:19:44,275 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4df84e78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 06:19:44, skipping insertion in model container [2021-05-02 18:19:44,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 06:19:44" (4/4) ... [2021-05-02 18:19:44,277 INFO L111 eAbstractionObserver]: Analyzing ICFG gj2007b.iJordan [2021-05-02 18:19:44,281 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 18:19:44,284 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 18:19:44,296 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 18:19:44,310 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 18:19:44,310 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 18:19:44,310 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 18:19:44,310 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 18:19:44,310 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 18:19:44,310 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 18:19:44,310 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 18:19:44,310 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 18:19:44,320 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 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) [2021-05-02 18:19:44,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 18:19:44,325 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:19:44,325 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:19:44,325 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:19:44,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:19:44,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1113749397, now seen corresponding path program 1 times [2021-05-02 18:19:44,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:19:44,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837496903] [2021-05-02 18:19:44,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:19:44,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:44,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:19:44,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:44,546 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 18:19:44,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:19:44,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837496903] [2021-05-02 18:19:44,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837496903] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:19:44,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:19:44,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 18:19:44,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408756011] [2021-05-02 18:19:44,558 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 18:19:44,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:19:44,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 18:19:44,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 18:19:44,572 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:44,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:19:44,619 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2021-05-02 18:19:44,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 18:19:44,621 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 18:19:44,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:19:44,627 INFO L225 Difference]: With dead ends: 22 [2021-05-02 18:19:44,627 INFO L226 Difference]: Without dead ends: 17 [2021-05-02 18:19:44,629 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 18:19:44,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-02 18:19:44,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-02 18:19:44,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 18:19:44,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-05-02 18:19:44,654 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-05-02 18:19:44,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:19:44,654 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-05-02 18:19:44,654 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 18:19:44,654 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-05-02 18:19:44,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 18:19:44,655 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:19:44,655 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:19:44,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 18:19:44,656 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:19:44,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:19:44,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1114672918, now seen corresponding path program 1 times [2021-05-02 18:19:44,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:19:44,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586668852] [2021-05-02 18:19:44,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:19:44,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:44,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:19:44,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:44,814 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 18:19:44,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:19:44,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586668852] [2021-05-02 18:19:44,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586668852] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:19:44,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:19:44,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 18:19:44,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943717979] [2021-05-02 18:19:44,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 18:19:44,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:19:44,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 18:19:44,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 18:19:44,819 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:44,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:19:44,999 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2021-05-02 18:19:45,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 18:19:45,000 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 18:19:45,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:19:45,001 INFO L225 Difference]: With dead ends: 26 [2021-05-02 18:19:45,001 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 18:19:45,002 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 137.4ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 18:19:45,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 18:19:45,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-05-02 18:19:45,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.3125) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 18:19:45,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-05-02 18:19:45,006 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 11 [2021-05-02 18:19:45,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:19:45,006 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-05-02 18:19:45,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:45,006 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-05-02 18:19:45,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 18:19:45,007 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:19:45,007 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:19:45,007 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 18:19:45,007 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:19:45,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:19:45,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1184176601, now seen corresponding path program 1 times [2021-05-02 18:19:45,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:19:45,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572203057] [2021-05-02 18:19:45,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:19:45,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:45,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:19:45,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:45,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:19:45,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:19:45,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572203057] [2021-05-02 18:19:45,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572203057] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:45,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164562490] [2021-05-02 18:19:45,144 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 [2021-05-02 18:19:45,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:45,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 18:19:45,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:19:45,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:45,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:45,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:45,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:19:45,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164562490] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:45,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:19:45,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-05-02 18:19:45,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552551598] [2021-05-02 18:19:45,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 18:19:45,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:19:45,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 18:19:45,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-02 18:19:45,297 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:45,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:19:45,435 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2021-05-02 18:19:45,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 18:19:45,435 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-02 18:19:45,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:19:45,437 INFO L225 Difference]: With dead ends: 35 [2021-05-02 18:19:45,437 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 18:19:45,438 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 165.9ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-05-02 18:19:45,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 18:19:45,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 19. [2021-05-02 18:19:45,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 18:19:45,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-05-02 18:19:45,441 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2021-05-02 18:19:45,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:19:45,441 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-05-02 18:19:45,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:19:45,442 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-05-02 18:19:45,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-02 18:19:45,442 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:19:45,442 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:19:45,657 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 18:19:45,657 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:19:45,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:19:45,658 INFO L82 PathProgramCache]: Analyzing trace with hash 727226116, now seen corresponding path program 1 times [2021-05-02 18:19:45,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:19:45,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621173752] [2021-05-02 18:19:45,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:19:45,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:45,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:19:45,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:45,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-05-02 18:19:45,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:45,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:19:45,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:19:45,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621173752] [2021-05-02 18:19:45,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621173752] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:19:45,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:19:45,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 18:19:45,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602007286] [2021-05-02 18:19:45,715 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 18:19:45,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:19:45,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 18:19:45,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 18:19:45,715 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 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) [2021-05-02 18:19:45,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:19:45,854 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-05-02 18:19:45,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 18:19:45,855 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 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 16 [2021-05-02 18:19:45,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:19:45,856 INFO L225 Difference]: With dead ends: 30 [2021-05-02 18:19:45,856 INFO L226 Difference]: Without dead ends: 22 [2021-05-02 18:19:45,857 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 102.7ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-05-02 18:19:45,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-02 18:19:45,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2021-05-02 18:19:45,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 18:19:45,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-05-02 18:19:45,862 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2021-05-02 18:19:45,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:19:45,863 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-05-02 18:19:45,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 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) [2021-05-02 18:19:45,863 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-05-02 18:19:45,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-02 18:19:45,864 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:19:45,864 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:19:45,864 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 18:19:45,864 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:19:45,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:19:45,865 INFO L82 PathProgramCache]: Analyzing trace with hash -415543775, now seen corresponding path program 1 times [2021-05-02 18:19:45,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:19:45,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738104310] [2021-05-02 18:19:45,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:19:45,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:45,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:19:45,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:45,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-02 18:19:45,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:45,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:19:45,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:19:45,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738104310] [2021-05-02 18:19:45,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738104310] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:45,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447342535] [2021-05-02 18:19:45,958 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 [2021-05-02 18:19:45,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:19:45,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 18:19:45,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:19:46,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:46,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:46,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:46,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:19:46,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:19:46,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447342535] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:19:46,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:19:46,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-05-02 18:19:46,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674473477] [2021-05-02 18:19:46,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 18:19:46,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:19:46,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 18:19:46,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-05-02 18:19:46,152 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 18:19:46,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:19:46,470 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2021-05-02 18:19:46,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 18:19:46,471 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 19 [2021-05-02 18:19:46,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:19:46,472 INFO L225 Difference]: With dead ends: 25 [2021-05-02 18:19:46,472 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 18:19:46,472 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 330.0ms TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-05-02 18:19:46,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 18:19:46,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 18:19:46,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 18:19:46,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 18:19:46,473 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2021-05-02 18:19:46,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:19:46,473 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 18:19:46,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 18:19:46,473 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 18:19:46,473 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 18:19:46,691 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:19:46,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 06:19:46 BasicIcfg [2021-05-02 18:19:46,695 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 18:19:46,696 INFO L168 Benchmark]: Toolchain (without parser) took 3041.52 ms. Allocated memory was 198.2 MB in the beginning and 248.5 MB in the end (delta: 50.3 MB). Free memory was 163.5 MB in the beginning and 126.5 MB in the end (delta: 36.9 MB). Peak memory consumption was 87.5 MB. Max. memory is 8.0 GB. [2021-05-02 18:19:46,696 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 198.2 MB. Free memory was 180.0 MB in the beginning and 179.9 MB in the end (delta: 106.0 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 18:19:46,696 INFO L168 Benchmark]: CACSL2BoogieTranslator took 223.11 ms. Allocated memory is still 198.2 MB. Free memory was 163.3 MB in the beginning and 181.4 MB in the end (delta: -18.1 MB). Peak memory consumption was 11.7 MB. Max. memory is 8.0 GB. [2021-05-02 18:19:46,696 INFO L168 Benchmark]: Boogie Preprocessor took 38.87 ms. Allocated memory is still 198.2 MB. Free memory was 181.4 MB in the beginning and 180.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 18:19:46,696 INFO L168 Benchmark]: RCFGBuilder took 309.17 ms. Allocated memory is still 198.2 MB. Free memory was 179.8 MB in the beginning and 165.2 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 18:19:46,696 INFO L168 Benchmark]: IcfgTransformer took 31.73 ms. Allocated memory is still 198.2 MB. Free memory was 165.2 MB in the beginning and 163.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 18:19:46,697 INFO L168 Benchmark]: TraceAbstraction took 2428.59 ms. Allocated memory was 198.2 MB in the beginning and 248.5 MB in the end (delta: 50.3 MB). Free memory was 163.6 MB in the beginning and 126.5 MB in the end (delta: 37.0 MB). Peak memory consumption was 88.4 MB. Max. memory is 8.0 GB. [2021-05-02 18:19:46,697 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 198.2 MB. Free memory was 180.0 MB in the beginning and 179.9 MB in the end (delta: 106.0 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 223.11 ms. Allocated memory is still 198.2 MB. Free memory was 163.3 MB in the beginning and 181.4 MB in the end (delta: -18.1 MB). Peak memory consumption was 11.7 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.87 ms. Allocated memory is still 198.2 MB. Free memory was 181.4 MB in the beginning and 180.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 309.17 ms. Allocated memory is still 198.2 MB. Free memory was 179.8 MB in the beginning and 165.2 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 31.73 ms. Allocated memory is still 198.2 MB. Free memory was 165.2 MB in the beginning and 163.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2428.59 ms. Allocated memory was 198.2 MB in the beginning and 248.5 MB in the end (delta: 50.3 MB). Free memory was 163.6 MB in the beginning and 126.5 MB in the end (delta: 37.0 MB). Peak memory consumption was 88.4 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, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2384.2ms, OverallIterations: 5, TraceHistogramMax: 2, EmptinessCheckTime: 10.0ms, AutomataDifference: 857.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 66 SDtfs, 146 SDslu, 121 SDs, 0 SdLazy, 269 SolverSat, 75 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 222.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 94 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 785.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=2, InterpolantAutomatonStates: 37, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 27.1ms AutomataMinimizationTime, 5 MinimizatonAttempts, 17 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 38.0ms SsaConstructionTime, 107.1ms SatisfiabilityAnalysisTime, 728.9ms InterpolantComputationTime, 104 NumberOfCodeBlocks, 104 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 97 ConstructedInterpolants, 0 QuantifiedInterpolants, 351 SizeOfPredicates, 5 NumberOfNonLiveVariables, 179 ConjunctsInSsa, 23 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 5/10 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...