/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/apache-escape-absolute.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 18:06:51,791 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 18:06:51,794 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 18:06:51,834 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 18:06:51,834 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 18:06:51,838 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 18:06:51,840 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 18:06:51,845 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 18:06:51,847 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 18:06:51,851 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 18:06:51,852 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 18:06:51,853 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 18:06:51,853 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 18:06:51,855 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 18:06:51,857 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 18:06:51,858 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 18:06:51,861 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 18:06:51,862 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 18:06:51,864 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 18:06:51,871 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 18:06:51,872 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 18:06:51,873 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 18:06:51,874 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 18:06:51,876 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 18:06:51,882 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 18:06:51,893 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 18:06:51,893 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 18:06:51,894 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 18:06:51,898 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 18:06:51,926 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 18:06:51,927 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 18:06:51,930 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 18:06:51,930 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 18:06:51,930 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 18:06:51,930 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 18:06:51,931 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 18:06:51,931 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 18:06:51,931 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 18:06:51,931 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 18:06:51,932 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 18:06:51,932 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 18:06:51,932 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 18:06:51,932 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 18:06:51,933 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 18:06:51,933 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 18:06:51,933 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 18:06:51,933 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 18:06:51,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 18:06:51,933 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 18:06:51,933 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 18:06:51,935 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 18:06:51,935 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 18:06:52,283 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 18:06:52,306 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 18:06:52,308 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 18:06:52,309 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 18:06:52,310 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 18:06:52,311 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/apache-escape-absolute.i [2021-05-02 18:06:52,369 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05f44a261/5e52a35caad8494ea9b5dcc09ce1e38d/FLAGf21f857ab [2021-05-02 18:06:52,731 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 18:06:52,731 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/apache-escape-absolute.i [2021-05-02 18:06:52,740 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05f44a261/5e52a35caad8494ea9b5dcc09ce1e38d/FLAGf21f857ab [2021-05-02 18:06:53,138 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05f44a261/5e52a35caad8494ea9b5dcc09ce1e38d [2021-05-02 18:06:53,140 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 18:06:53,142 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 18:06:53,145 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 18:06:53,145 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 18:06:53,149 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 18:06:53,149 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 06:06:53" (1/1) ... [2021-05-02 18:06:53,150 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70ee5bc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:06:53, skipping insertion in model container [2021-05-02 18:06:53,151 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 06:06:53" (1/1) ... [2021-05-02 18:06:53,156 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 18:06:53,174 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 18:06:53,294 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/apache-escape-absolute.i[893,906] [2021-05-02 18:06:53,309 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 18:06:53,316 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 18:06:53,325 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/apache-escape-absolute.i[893,906] [2021-05-02 18:06:53,334 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 18:06:53,347 INFO L208 MainTranslator]: Completed translation [2021-05-02 18:06:53,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:06:53 WrapperNode [2021-05-02 18:06:53,348 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 18:06:53,348 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 18:06:53,348 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 18:06:53,349 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 18:06:53,356 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:06:53" (1/1) ... [2021-05-02 18:06:53,356 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:06:53" (1/1) ... [2021-05-02 18:06:53,362 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:06:53" (1/1) ... [2021-05-02 18:06:53,362 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:06:53" (1/1) ... [2021-05-02 18:06:53,367 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:06:53" (1/1) ... [2021-05-02 18:06:53,371 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:06:53" (1/1) ... [2021-05-02 18:06:53,372 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:06:53" (1/1) ... [2021-05-02 18:06:53,375 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 18:06:53,376 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 18:06:53,376 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 18:06:53,376 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 18:06:53,377 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:06:53" (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 18:06:53,481 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 18:06:53,481 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 18:06:53,481 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 18:06:53,482 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 18:06:53,482 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 18:06:53,482 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 18:06:53,482 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 18:06:53,482 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 18:06:53,483 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 18:06:53,483 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 18:06:53,483 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 18:06:53,483 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 18:06:53,483 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 18:06:53,484 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 18:06:53,484 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 18:06:53,485 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 18:06:53,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 18:06:53,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 18:06:53,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 18:06:53,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 18:06:53,487 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 18:06:53,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 18:06:53,823 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 18:06:53,824 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 18:06:53,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:06:53 BoogieIcfgContainer [2021-05-02 18:06:53,825 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 18:06:53,826 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 18:06:53,826 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 18:06:53,826 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 18:06:53,828 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:06:53" (1/1) ... [2021-05-02 18:06:53,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 06:06:53 BasicIcfg [2021-05-02 18:06:53,844 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 18:06:53,846 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 18:06:53,846 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 18:06:53,848 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 18:06:53,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 06:06:53" (1/4) ... [2021-05-02 18:06:53,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1af11af3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 06:06:53, skipping insertion in model container [2021-05-02 18:06:53,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:06:53" (2/4) ... [2021-05-02 18:06:53,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1af11af3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 06:06:53, skipping insertion in model container [2021-05-02 18:06:53,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:06:53" (3/4) ... [2021-05-02 18:06:53,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1af11af3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 06:06:53, skipping insertion in model container [2021-05-02 18:06:53,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 06:06:53" (4/4) ... [2021-05-02 18:06:53,851 INFO L111 eAbstractionObserver]: Analyzing ICFG apache-escape-absolute.iJordan [2021-05-02 18:06:53,855 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 18:06:53,858 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 18:06:53,871 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 18:06:53,886 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 18:06:53,886 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 18:06:53,886 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 18:06:53,886 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 18:06:53,886 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 18:06:53,886 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 18:06:53,886 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 18:06:53,887 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 18:06:53,915 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 33 states have internal predecessors, (48), 20 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 18:06:53,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 18:06:53,920 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:06:53,921 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:06:53,921 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:06:53,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:06:53,925 INFO L82 PathProgramCache]: Analyzing trace with hash -505878006, now seen corresponding path program 1 times [2021-05-02 18:06:53,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:06:53,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874656502] [2021-05-02 18:06:53,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:06:54,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:54,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:06:54,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:54,252 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 18:06:54,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:06:54,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874656502] [2021-05-02 18:06:54,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874656502] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:06:54,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:06:54,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 18:06:54,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432036886] [2021-05-02 18:06:54,266 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 18:06:54,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:06:54,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 18:06:54,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 18:06:54,283 INFO L87 Difference]: Start difference. First operand has 54 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 33 states have internal predecessors, (48), 20 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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 18:06:54,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:06:54,733 INFO L93 Difference]: Finished difference Result 72 states and 112 transitions. [2021-05-02 18:06:54,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 18:06:54,735 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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 17 [2021-05-02 18:06:54,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:06:54,742 INFO L225 Difference]: With dead ends: 72 [2021-05-02 18:06:54,742 INFO L226 Difference]: Without dead ends: 64 [2021-05-02 18:06:54,745 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 168.8ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 18:06:54,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-02 18:06:54,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2021-05-02 18:06:54,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 35 states have internal predecessors, (37), 22 states have call successors, (22), 4 states have call predecessors, (22), 3 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 18:06:54,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 80 transitions. [2021-05-02 18:06:54,795 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 80 transitions. Word has length 17 [2021-05-02 18:06:54,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:06:54,796 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 80 transitions. [2021-05-02 18:06:54,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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 18:06:54,796 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 80 transitions. [2021-05-02 18:06:54,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 18:06:54,798 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:06:54,798 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] [2021-05-02 18:06:54,798 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 18:06:54,799 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:06:54,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:06:54,800 INFO L82 PathProgramCache]: Analyzing trace with hash 722598363, now seen corresponding path program 1 times [2021-05-02 18:06:54,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:06:54,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10666263] [2021-05-02 18:06:54,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:06:54,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:54,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:06:54,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:54,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-05-02 18:06:54,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:54,888 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 18:06:54,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:06:54,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10666263] [2021-05-02 18:06:54,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10666263] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:06:54,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:06:54,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 18:06:54,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487816242] [2021-05-02 18:06:54,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 18:06:54,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:06:54,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 18:06:54,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 18:06:54,891 INFO L87 Difference]: Start difference. First operand 57 states and 80 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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 18:06:55,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:06:55,227 INFO L93 Difference]: Finished difference Result 61 states and 83 transitions. [2021-05-02 18:06:55,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 18:06:55,228 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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 22 [2021-05-02 18:06:55,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:06:55,230 INFO L225 Difference]: With dead ends: 61 [2021-05-02 18:06:55,231 INFO L226 Difference]: Without dead ends: 61 [2021-05-02 18:06:55,231 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 135.1ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-05-02 18:06:55,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-02 18:06:55,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-05-02 18:06:55,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 38 states have internal predecessors, (40), 22 states have call successors, (22), 5 states have call predecessors, (22), 4 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 18:06:55,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 83 transitions. [2021-05-02 18:06:55,239 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 83 transitions. Word has length 22 [2021-05-02 18:06:55,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:06:55,239 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 83 transitions. [2021-05-02 18:06:55,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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 18:06:55,239 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 83 transitions. [2021-05-02 18:06:55,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 18:06:55,241 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:06:55,241 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:06:55,241 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 18:06:55,241 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:06:55,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:06:55,242 INFO L82 PathProgramCache]: Analyzing trace with hash 349034817, now seen corresponding path program 1 times [2021-05-02 18:06:55,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:06:55,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022527764] [2021-05-02 18:06:55,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:06:55,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:55,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:06:55,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:55,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-05-02 18:06:55,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:55,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-05-02 18:06:55,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:55,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-05-02 18:06:55,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:55,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-05-02 18:06:55,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:55,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-05-02 18:06:55,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:55,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-05-02 18:06:55,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:55,319 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 18:06:55,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:06:55,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022527764] [2021-05-02 18:06:55,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022527764] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:06:55,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:06:55,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 18:06:55,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550992268] [2021-05-02 18:06:55,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 18:06:55,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:06:55,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 18:06:55,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 18:06:55,321 INFO L87 Difference]: Start difference. First operand 61 states and 83 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 18:06:55,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:06:55,466 INFO L93 Difference]: Finished difference Result 64 states and 87 transitions. [2021-05-02 18:06:55,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 18:06:55,467 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 51 [2021-05-02 18:06:55,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:06:55,468 INFO L225 Difference]: With dead ends: 64 [2021-05-02 18:06:55,468 INFO L226 Difference]: Without dead ends: 61 [2021-05-02 18:06:55,469 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 18:06:55,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-02 18:06:55,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-05-02 18:06:55,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 38 states have internal predecessors, (38), 22 states have call successors, (22), 5 states have call predecessors, (22), 4 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 18:06:55,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 81 transitions. [2021-05-02 18:06:55,475 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 81 transitions. Word has length 51 [2021-05-02 18:06:55,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:06:55,475 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 81 transitions. [2021-05-02 18:06:55,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 18:06:55,476 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 81 transitions. [2021-05-02 18:06:55,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 18:06:55,477 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:06:55,477 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:06:55,477 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 18:06:55,477 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:06:55,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:06:55,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1328286090, now seen corresponding path program 1 times [2021-05-02 18:06:55,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:06:55,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379968533] [2021-05-02 18:06:55,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:06:55,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:55,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:06:55,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:55,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-05-02 18:06:55,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:55,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-05-02 18:06:55,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:55,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-05-02 18:06:55,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:55,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-05-02 18:06:55,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:55,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-05-02 18:06:55,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:55,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-05-02 18:06:55,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:55,579 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 18:06:55,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:06:55,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379968533] [2021-05-02 18:06:55,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379968533] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:06:55,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:06:55,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 18:06:55,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972224739] [2021-05-02 18:06:55,580 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 18:06:55,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:06:55,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 18:06:55,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 18:06:55,581 INFO L87 Difference]: Start difference. First operand 61 states and 81 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 18:06:55,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:06:55,905 INFO L93 Difference]: Finished difference Result 66 states and 85 transitions. [2021-05-02 18:06:55,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 18:06:55,906 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 52 [2021-05-02 18:06:55,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:06:55,907 INFO L225 Difference]: With dead ends: 66 [2021-05-02 18:06:55,907 INFO L226 Difference]: Without dead ends: 66 [2021-05-02 18:06:55,907 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 131.2ms TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-05-02 18:06:55,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-05-02 18:06:55,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2021-05-02 18:06:55,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 41 states have internal predecessors, (41), 22 states have call successors, (22), 6 states have call predecessors, (22), 5 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 18:06:55,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 84 transitions. [2021-05-02 18:06:55,913 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 84 transitions. Word has length 52 [2021-05-02 18:06:55,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:06:55,913 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 84 transitions. [2021-05-02 18:06:55,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 18:06:55,914 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 84 transitions. [2021-05-02 18:06:55,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 18:06:55,915 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:06:55,915 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:06:55,915 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 18:06:55,915 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:06:55,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:06:55,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1785526948, now seen corresponding path program 1 times [2021-05-02 18:06:55,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:06:55,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177307155] [2021-05-02 18:06:55,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:06:55,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:55,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:06:56,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:56,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-05-02 18:06:56,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:56,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-05-02 18:06:56,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:56,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-05-02 18:06:56,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:56,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-05-02 18:06:56,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:56,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-05-02 18:06:56,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:56,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-05-02 18:06:56,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:56,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-05-02 18:06:56,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:56,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-05-02 18:06:56,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:56,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-05-02 18:06:56,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:56,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-05-02 18:06:56,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:56,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-05-02 18:06:56,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:56,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-05-02 18:06:56,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:56,041 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-05-02 18:06:56,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:06:56,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177307155] [2021-05-02 18:06:56,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177307155] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:06:56,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:06:56,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 18:06:56,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147763785] [2021-05-02 18:06:56,042 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 18:06:56,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:06:56,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 18:06:56,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 18:06:56,043 INFO L87 Difference]: Start difference. First operand 65 states and 84 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-05-02 18:06:56,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:06:56,337 INFO L93 Difference]: Finished difference Result 72 states and 90 transitions. [2021-05-02 18:06:56,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 18:06:56,346 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 87 [2021-05-02 18:06:56,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:06:56,347 INFO L225 Difference]: With dead ends: 72 [2021-05-02 18:06:56,347 INFO L226 Difference]: Without dead ends: 72 [2021-05-02 18:06:56,347 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 120.6ms TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-05-02 18:06:56,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-02 18:06:56,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2021-05-02 18:06:56,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 40 states have (on average 1.1) internal successors, (44), 44 states have internal predecessors, (44), 22 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 18:06:56,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 87 transitions. [2021-05-02 18:06:56,353 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 87 transitions. Word has length 87 [2021-05-02 18:06:56,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:06:56,354 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 87 transitions. [2021-05-02 18:06:56,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-05-02 18:06:56,354 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 87 transitions. [2021-05-02 18:06:56,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 18:06:56,355 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:06:56,355 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:06:56,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-02 18:06:56,356 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:06:56,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:06:56,356 INFO L82 PathProgramCache]: Analyzing trace with hash 874819922, now seen corresponding path program 1 times [2021-05-02 18:06:56,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:06:56,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604176396] [2021-05-02 18:06:56,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:06:56,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:56,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:06:56,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:56,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-05-02 18:06:56,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:56,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-05-02 18:06:56,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:56,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-05-02 18:06:56,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:56,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-05-02 18:06:56,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:56,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-05-02 18:06:56,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:56,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-05-02 18:06:56,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:56,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-05-02 18:06:56,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:56,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-05-02 18:06:56,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:56,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-05-02 18:06:56,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:56,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-05-02 18:06:56,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:56,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-05-02 18:06:56,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:56,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-05-02 18:06:56,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:56,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-05-02 18:06:56,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:56,462 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-05-02 18:06:56,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:06:56,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604176396] [2021-05-02 18:06:56,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604176396] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:06:56,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:06:56,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 18:06:56,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023907379] [2021-05-02 18:06:56,464 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 18:06:56,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:06:56,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 18:06:56,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 18:06:56,465 INFO L87 Difference]: Start difference. First operand 69 states and 87 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-05-02 18:06:56,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:06:56,809 INFO L93 Difference]: Finished difference Result 73 states and 94 transitions. [2021-05-02 18:06:56,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 18:06:56,810 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 92 [2021-05-02 18:06:56,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:06:56,810 INFO L225 Difference]: With dead ends: 73 [2021-05-02 18:06:56,810 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 18:06:56,811 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 117.1ms TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-05-02 18:06:56,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 18:06:56,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 18:06:56,811 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 18:06:56,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 18:06:56,811 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 92 [2021-05-02 18:06:56,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:06:56,812 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 18:06:56,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-05-02 18:06:56,812 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 18:06:56,812 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 18:06:56,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-02 18:06:56,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 06:06:56 BasicIcfg [2021-05-02 18:06:56,816 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 18:06:56,816 INFO L168 Benchmark]: Toolchain (without parser) took 3674.41 ms. Allocated memory was 189.8 MB in the beginning and 228.6 MB in the end (delta: 38.8 MB). Free memory was 155.1 MB in the beginning and 160.5 MB in the end (delta: -5.4 MB). Peak memory consumption was 34.8 MB. Max. memory is 8.0 GB. [2021-05-02 18:06:56,817 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 189.8 MB. Free memory is still 171.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 18:06:56,817 INFO L168 Benchmark]: CACSL2BoogieTranslator took 202.66 ms. Allocated memory is still 189.8 MB. Free memory was 154.8 MB in the beginning and 144.6 MB in the end (delta: 10.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 18:06:56,818 INFO L168 Benchmark]: Boogie Preprocessor took 26.95 ms. Allocated memory is still 189.8 MB. Free memory was 144.6 MB in the beginning and 142.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 18:06:56,818 INFO L168 Benchmark]: RCFGBuilder took 449.00 ms. Allocated memory is still 189.8 MB. Free memory was 142.9 MB in the beginning and 154.2 MB in the end (delta: -11.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. [2021-05-02 18:06:56,819 INFO L168 Benchmark]: IcfgTransformer took 18.95 ms. Allocated memory is still 189.8 MB. Free memory was 154.2 MB in the beginning and 152.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 18:06:56,819 INFO L168 Benchmark]: TraceAbstraction took 2970.13 ms. Allocated memory was 189.8 MB in the beginning and 228.6 MB in the end (delta: 38.8 MB). Free memory was 152.1 MB in the beginning and 160.5 MB in the end (delta: -8.4 MB). Peak memory consumption was 31.3 MB. Max. memory is 8.0 GB. [2021-05-02 18:06:56,821 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 189.8 MB. Free memory is still 171.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 202.66 ms. Allocated memory is still 189.8 MB. Free memory was 154.8 MB in the beginning and 144.6 MB in the end (delta: 10.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 26.95 ms. Allocated memory is still 189.8 MB. Free memory was 144.6 MB in the beginning and 142.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 449.00 ms. Allocated memory is still 189.8 MB. Free memory was 142.9 MB in the beginning and 154.2 MB in the end (delta: -11.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. * IcfgTransformer took 18.95 ms. Allocated memory is still 189.8 MB. Free memory was 154.2 MB in the beginning and 152.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2970.13 ms. Allocated memory was 189.8 MB in the beginning and 228.6 MB in the end (delta: 38.8 MB). Free memory was 152.1 MB in the beginning and 160.5 MB in the end (delta: -8.4 MB). Peak memory consumption was 31.3 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, 54 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2928.5ms, OverallIterations: 6, TraceHistogramMax: 14, EmptinessCheckTime: 15.9ms, AutomataDifference: 1945.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 24.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 294 SDtfs, 277 SDslu, 334 SDs, 0 SdLazy, 1031 SolverSat, 319 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1046.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 146 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 703.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=69occurred in iteration=5, InterpolantAutomatonStates: 43, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 64.3ms AutomataMinimizationTime, 6 MinimizatonAttempts, 11 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 27.1ms SsaConstructionTime, 102.8ms SatisfiabilityAnalysisTime, 598.5ms InterpolantComputationTime, 321 NumberOfCodeBlocks, 321 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 315 ConstructedInterpolants, 0 QuantifiedInterpolants, 610 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 772/772 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...