/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/nla-digbench-scaling/ps4-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 10:27:11,881 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 10:27:11,882 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 10:27:11,900 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 10:27:11,901 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 10:27:11,901 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 10:27:11,902 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 10:27:11,903 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 10:27:11,905 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 10:27:11,905 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 10:27:11,906 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 10:27:11,907 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 10:27:11,907 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 10:27:11,907 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 10:27:11,908 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 10:27:11,909 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 10:27:11,909 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 10:27:11,910 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 10:27:11,911 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 10:27:11,913 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 10:27:11,914 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 10:27:11,915 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 10:27:11,916 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 10:27:11,916 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 10:27:11,918 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 10:27:11,923 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 10:27:11,924 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 10:27:11,924 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 10:27:11,925 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 10:27:11,931 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 10:27:11,931 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 10:27:11,932 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 10:27:11,932 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 10:27:11,932 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 10:27:11,932 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 10:27:11,932 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 10:27:11,932 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 10:27:11,932 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 10:27:11,932 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 10:27:11,932 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 10:27:11,933 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 10:27:11,933 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 10:27:11,933 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 10:27:11,933 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 10:27:11,933 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 10:27:11,933 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 10:27:11,933 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 10:27:11,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 10:27:11,933 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 10:27:11,933 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 10:27:11,934 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 10:27:11,934 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 10:27:12,188 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 10:27:12,206 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 10:27:12,208 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 10:27:12,208 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 10:27:12,209 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 10:27:12,210 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound5.c [2021-05-06 10:27:12,257 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f923f29de/a76dedd53365410fa197fcb8376f51c9/FLAG2737d4bf7 [2021-05-06 10:27:12,607 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 10:27:12,607 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound5.c [2021-05-06 10:27:12,612 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f923f29de/a76dedd53365410fa197fcb8376f51c9/FLAG2737d4bf7 [2021-05-06 10:27:12,623 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f923f29de/a76dedd53365410fa197fcb8376f51c9 [2021-05-06 10:27:12,625 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 10:27:12,627 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 10:27:12,630 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 10:27:12,630 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 10:27:12,632 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 10:27:12,632 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:27:12" (1/1) ... [2021-05-06 10:27:12,633 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7df5ea43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:27:12, skipping insertion in model container [2021-05-06 10:27:12,633 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:27:12" (1/1) ... [2021-05-06 10:27:12,638 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 10:27:12,652 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 10:27:12,771 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound5.c[458,471] [2021-05-06 10:27:12,784 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:27:12,800 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 10:27:12,821 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound5.c[458,471] [2021-05-06 10:27:12,833 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:27:12,845 INFO L208 MainTranslator]: Completed translation [2021-05-06 10:27:12,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:27:12 WrapperNode [2021-05-06 10:27:12,846 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 10:27:12,846 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 10:27:12,846 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 10:27:12,847 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 10:27:12,858 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:27:12" (1/1) ... [2021-05-06 10:27:12,860 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:27:12" (1/1) ... [2021-05-06 10:27:12,865 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:27:12" (1/1) ... [2021-05-06 10:27:12,866 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:27:12" (1/1) ... [2021-05-06 10:27:12,874 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:27:12" (1/1) ... [2021-05-06 10:27:12,879 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:27:12" (1/1) ... [2021-05-06 10:27:12,880 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:27:12" (1/1) ... [2021-05-06 10:27:12,884 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 10:27:12,885 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 10:27:12,886 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 10:27:12,886 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 10:27:12,886 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:27:12" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 10:27:12,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 10:27:12,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 10:27:12,939 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 10:27:12,939 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 10:27:12,939 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 10:27:12,939 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 10:27:12,939 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 10:27:12,939 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 10:27:12,940 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 10:27:12,940 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 10:27:12,940 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-06 10:27:12,940 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 10:27:12,940 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 10:27:12,940 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 10:27:12,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 10:27:12,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 10:27:12,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 10:27:12,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 10:27:12,941 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 10:27:12,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 10:27:13,152 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 10:27:13,153 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 10:27:13,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:27:13 BoogieIcfgContainer [2021-05-06 10:27:13,154 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 10:27:13,154 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 10:27:13,154 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 10:27:13,155 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 10:27:13,156 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:27:13" (1/1) ... [2021-05-06 10:27:13,181 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:27:13 BasicIcfg [2021-05-06 10:27:13,181 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 10:27:13,182 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 10:27:13,182 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 10:27:13,184 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 10:27:13,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 10:27:12" (1/4) ... [2021-05-06 10:27:13,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@286cd915 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:27:13, skipping insertion in model container [2021-05-06 10:27:13,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:27:12" (2/4) ... [2021-05-06 10:27:13,185 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@286cd915 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:27:13, skipping insertion in model container [2021-05-06 10:27:13,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:27:13" (3/4) ... [2021-05-06 10:27:13,185 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@286cd915 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 10:27:13, skipping insertion in model container [2021-05-06 10:27:13,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:27:13" (4/4) ... [2021-05-06 10:27:13,186 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_valuebound5.cJordan [2021-05-06 10:27:13,189 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 10:27:13,191 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 10:27:13,214 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 10:27:13,226 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 10:27:13,226 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 10:27:13,226 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 10:27:13,226 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 10:27:13,227 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 10:27:13,227 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 10:27:13,227 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 10:27:13,227 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 10:27:13,237 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 10:27:13,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 10:27:13,243 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:27:13,243 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:27:13,243 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:27:13,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:27:13,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1885409022, now seen corresponding path program 1 times [2021-05-06 10:27:13,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:27:13,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349593407] [2021-05-06 10:27:13,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:27:13,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:27:13,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 10:27:13,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:27:13,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 10:27:13,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:27:13,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:27:13,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:27:13,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349593407] [2021-05-06 10:27:13,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349593407] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:27:13,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:27:13,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 10:27:13,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838687748] [2021-05-06 10:27:13,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 10:27:13,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:27:13,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 10:27:13,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:27:13,485 INFO L87 Difference]: Start difference. First operand has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:27:13,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:27:13,535 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2021-05-06 10:27:13,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 10:27:13,537 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 10:27:13,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:27:13,543 INFO L225 Difference]: With dead ends: 28 [2021-05-06 10:27:13,543 INFO L226 Difference]: Without dead ends: 23 [2021-05-06 10:27:13,544 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 58.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:27:13,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-06 10:27:13,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-06 10:27:13,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 10:27:13,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-05-06 10:27:13,566 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 17 [2021-05-06 10:27:13,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:27:13,567 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-05-06 10:27:13,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:27:13,567 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-05-06 10:27:13,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 10:27:13,569 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:27:13,569 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:27:13,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 10:27:13,569 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:27:13,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:27:13,570 INFO L82 PathProgramCache]: Analyzing trace with hash 603980644, now seen corresponding path program 1 times [2021-05-06 10:27:13,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:27:13,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353391483] [2021-05-06 10:27:13,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:27:13,595 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:27:13,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1519568680] [2021-05-06 10:27:13,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:13,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:27:13,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:27:13,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:27:13,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:13,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:27:13,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:27:13,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353391483] [2021-05-06 10:27:13,730 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:27:13,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519568680] [2021-05-06 10:27:13,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519568680] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:27:13,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:27:13,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 10:27:13,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189828110] [2021-05-06 10:27:13,732 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:27:13,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:27:13,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:27:13,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:27:13,733 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:27:13,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:27:13,766 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2021-05-06 10:27:13,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 10:27:13,766 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 10:27:13,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:27:13,767 INFO L225 Difference]: With dead ends: 32 [2021-05-06 10:27:13,767 INFO L226 Difference]: Without dead ends: 30 [2021-05-06 10:27:13,768 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:27:13,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-06 10:27:13,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-06 10:27:13,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 10:27:13,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-05-06 10:27:13,772 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 17 [2021-05-06 10:27:13,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:27:13,772 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-05-06 10:27:13,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:27:13,773 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-05-06 10:27:13,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-06 10:27:13,773 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:27:13,773 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:27:13,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 10:27:13,990 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:27:13,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:27:13,990 INFO L82 PathProgramCache]: Analyzing trace with hash -169450186, now seen corresponding path program 1 times [2021-05-06 10:27:13,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:27:13,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226529411] [2021-05-06 10:27:13,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:27:13,999 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:27:14,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [284133312] [2021-05-06 10:27:14,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:14,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:27:14,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 10:27:14,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:27:14,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:14,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:27:14,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:27:14,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226529411] [2021-05-06 10:27:14,143 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:27:14,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284133312] [2021-05-06 10:27:14,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284133312] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:27:14,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:27:14,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 10:27:14,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174214917] [2021-05-06 10:27:14,143 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:27:14,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:27:14,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:27:14,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:27:14,144 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:27:14,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:27:14,196 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2021-05-06 10:27:14,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:27:14,196 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-05-06 10:27:14,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:27:14,197 INFO L225 Difference]: With dead ends: 39 [2021-05-06 10:27:14,197 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 10:27:14,197 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.8ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:27:14,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 10:27:14,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-06 10:27:14,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 10:27:14,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-05-06 10:27:14,201 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 24 [2021-05-06 10:27:14,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:27:14,201 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-05-06 10:27:14,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:27:14,201 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-05-06 10:27:14,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-06 10:27:14,202 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:27:14,202 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:27:14,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:14,420 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:27:14,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:27:14,421 INFO L82 PathProgramCache]: Analyzing trace with hash -434891502, now seen corresponding path program 1 times [2021-05-06 10:27:14,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:27:14,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022245259] [2021-05-06 10:27:14,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:27:14,439 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:27:14,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1786753070] [2021-05-06 10:27:14,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:14,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:27:14,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 10:27:14,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:27:14,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:14,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:14,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:14,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:14,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:14,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:14,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:14,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:14,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:14,656 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 10:27:14,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:27:14,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022245259] [2021-05-06 10:27:14,656 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:27:14,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786753070] [2021-05-06 10:27:14,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786753070] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:27:14,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:27:14,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:27:14,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166014364] [2021-05-06 10:27:14,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:27:14,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:27:14,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:27:14,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:27:14,658 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 10:27:14,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:27:14,700 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2021-05-06 10:27:14,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 10:27:14,701 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2021-05-06 10:27:14,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:27:14,701 INFO L225 Difference]: With dead ends: 42 [2021-05-06 10:27:14,701 INFO L226 Difference]: Without dead ends: 37 [2021-05-06 10:27:14,701 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 37.0ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 10:27:14,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-06 10:27:14,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-06 10:27:14,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 10:27:14,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2021-05-06 10:27:14,705 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 30 [2021-05-06 10:27:14,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:27:14,705 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2021-05-06 10:27:14,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 10:27:14,705 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2021-05-06 10:27:14,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-06 10:27:14,706 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:27:14,706 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:27:14,922 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:14,923 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:27:14,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:27:14,923 INFO L82 PathProgramCache]: Analyzing trace with hash -570969308, now seen corresponding path program 2 times [2021-05-06 10:27:14,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:27:14,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575812819] [2021-05-06 10:27:14,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:27:14,930 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:27:14,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1932005285] [2021-05-06 10:27:14,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:14,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:27:14,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:27:14,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 10:27:14,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:27:15,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:15,088 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 10:27:15,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:27:15,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575812819] [2021-05-06 10:27:15,089 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:27:15,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932005285] [2021-05-06 10:27:15,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932005285] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:27:15,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:27:15,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:27:15,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370899425] [2021-05-06 10:27:15,090 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:27:15,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:27:15,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:27:15,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:27:15,090 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 10:27:21,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:27:21,792 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2021-05-06 10:27:21,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 10:27:21,794 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2021-05-06 10:27:21,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:27:21,794 INFO L225 Difference]: With dead ends: 46 [2021-05-06 10:27:21,794 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 10:27:21,795 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.8ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:27:21,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 10:27:21,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-05-06 10:27:21,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 30 states have internal predecessors, (31), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 10:27:21,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2021-05-06 10:27:21,799 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 31 [2021-05-06 10:27:21,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:27:21,799 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2021-05-06 10:27:21,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 10:27:21,799 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2021-05-06 10:27:21,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 10:27:21,800 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:27:21,800 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:27:22,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:22,012 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:27:22,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:27:22,012 INFO L82 PathProgramCache]: Analyzing trace with hash 725792896, now seen corresponding path program 2 times [2021-05-06 10:27:22,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:27:22,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176579172] [2021-05-06 10:27:22,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:27:22,019 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:27:22,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1220088002] [2021-05-06 10:27:22,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:22,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:27:22,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:27:22,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 10:27:22,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:27:22,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:22,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:22,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:22,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:22,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:22,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:22,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:22,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:22,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:22,200 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 10:27:22,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:27:22,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176579172] [2021-05-06 10:27:22,201 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:27:22,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220088002] [2021-05-06 10:27:22,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220088002] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:27:22,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:27:22,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 10:27:22,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889886569] [2021-05-06 10:27:22,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 10:27:22,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:27:22,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 10:27:22,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:27:22,202 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 10:27:22,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:27:22,256 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2021-05-06 10:27:22,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 10:27:22,256 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 37 [2021-05-06 10:27:22,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:27:22,257 INFO L225 Difference]: With dead ends: 49 [2021-05-06 10:27:22,257 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 10:27:22,257 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 48.0ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-06 10:27:22,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 10:27:22,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-06 10:27:22,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 29 states have internal predecessors, (30), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 10:27:22,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2021-05-06 10:27:22,260 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 37 [2021-05-06 10:27:22,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:27:22,261 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2021-05-06 10:27:22,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 10:27:22,261 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2021-05-06 10:27:22,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 10:27:22,261 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:27:22,261 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:27:22,475 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-06 10:27:22,476 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:27:22,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:27:22,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1050508662, now seen corresponding path program 3 times [2021-05-06 10:27:22,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:27:22,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698274932] [2021-05-06 10:27:22,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:27:22,483 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:27:22,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [750149588] [2021-05-06 10:27:22,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:22,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 10:27:22,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:27:22,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 10:27:22,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:27:22,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:22,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:22,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:22,608 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-05-06 10:27:22,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:27:22,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698274932] [2021-05-06 10:27:22,609 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:27:22,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750149588] [2021-05-06 10:27:22,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750149588] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:27:22,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:27:22,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:27:22,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079825217] [2021-05-06 10:27:22,609 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:27:22,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:27:22,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:27:22,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:27:22,610 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 10:27:22,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:27:22,663 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2021-05-06 10:27:22,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 10:27:22,663 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 38 [2021-05-06 10:27:22,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:27:22,664 INFO L225 Difference]: With dead ends: 48 [2021-05-06 10:27:22,664 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 10:27:22,664 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 45.2ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 10:27:22,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 10:27:22,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-05-06 10:27:22,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 10:27:22,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2021-05-06 10:27:22,667 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 38 [2021-05-06 10:27:22,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:27:22,667 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2021-05-06 10:27:22,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 10:27:22,667 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2021-05-06 10:27:22,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 10:27:22,668 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:27:22,668 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:27:22,887 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:22,887 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:27:22,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:27:22,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1487404370, now seen corresponding path program 3 times [2021-05-06 10:27:22,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:27:22,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311759025] [2021-05-06 10:27:22,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:27:22,893 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:27:22,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2001962351] [2021-05-06 10:27:22,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:23,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 10:27:23,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:27:23,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 10:27:23,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:27:23,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:23,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:23,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:23,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:23,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:23,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:23,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:23,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:23,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:23,205 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 10:27:23,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:27:23,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311759025] [2021-05-06 10:27:23,205 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:27:23,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001962351] [2021-05-06 10:27:23,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001962351] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:27:23,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:27:23,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 10:27:23,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759280594] [2021-05-06 10:27:23,206 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 10:27:23,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:27:23,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 10:27:23,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-06 10:27:23,206 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-06 10:27:23,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:27:23,279 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2021-05-06 10:27:23,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 10:27:23,279 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 44 [2021-05-06 10:27:23,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:27:23,279 INFO L225 Difference]: With dead ends: 51 [2021-05-06 10:27:23,279 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 10:27:23,280 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 63.2ms TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-06 10:27:23,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 10:27:23,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-05-06 10:27:23,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 10:27:23,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-05-06 10:27:23,283 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 44 [2021-05-06 10:27:23,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:27:23,283 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-05-06 10:27:23,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-06 10:27:23,283 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-05-06 10:27:23,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-06 10:27:23,283 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:27:23,284 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:27:23,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 10:27:23,513 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:27:23,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:27:23,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1178929216, now seen corresponding path program 4 times [2021-05-06 10:27:23,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:27:23,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965224559] [2021-05-06 10:27:23,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:27:23,518 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:27:23,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1563541445] [2021-05-06 10:27:23,518 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:23,589 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 10:27:23,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:27:23,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-06 10:27:23,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:27:23,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:23,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:23,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:23,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:23,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:23,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:23,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:23,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:23,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:23,720 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 10:27:23,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:27:23,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965224559] [2021-05-06 10:27:23,720 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:27:23,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563541445] [2021-05-06 10:27:23,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563541445] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:27:23,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:27:23,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 10:27:23,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360341470] [2021-05-06 10:27:23,723 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 10:27:23,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:27:23,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 10:27:23,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-06 10:27:23,723 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-06 10:27:23,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:27:23,791 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2021-05-06 10:27:23,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 10:27:23,792 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 51 [2021-05-06 10:27:23,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:27:23,793 INFO L225 Difference]: With dead ends: 54 [2021-05-06 10:27:23,793 INFO L226 Difference]: Without dead ends: 51 [2021-05-06 10:27:23,793 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 56.0ms TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-06 10:27:23,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-06 10:27:23,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-05-06 10:27:23,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 10:27:23,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2021-05-06 10:27:23,800 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 51 [2021-05-06 10:27:23,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:27:23,801 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2021-05-06 10:27:23,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-06 10:27:23,801 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2021-05-06 10:27:23,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-06 10:27:23,803 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:27:23,803 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:27:24,019 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 10:27:24,020 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:27:24,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:27:24,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1658817134, now seen corresponding path program 5 times [2021-05-06 10:27:24,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:27:24,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695968825] [2021-05-06 10:27:24,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:27:24,036 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:27:24,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2012551252] [2021-05-06 10:27:24,036 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:24,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 10:27:24,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:27:24,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 10:27:24,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:27:24,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:24,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:24,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:24,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:24,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:24,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:24,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:24,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:24,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:24,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:24,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:24,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:24,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:24,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:24,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:24,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:24,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:24,311 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-06 10:27:24,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:27:24,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695968825] [2021-05-06 10:27:24,311 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:27:24,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012551252] [2021-05-06 10:27:24,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012551252] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:27:24,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:27:24,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 10:27:24,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009564352] [2021-05-06 10:27:24,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 10:27:24,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:27:24,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 10:27:24,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-05-06 10:27:24,312 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-05-06 10:27:24,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:27:24,391 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2021-05-06 10:27:24,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 10:27:24,391 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 58 [2021-05-06 10:27:24,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:27:24,393 INFO L225 Difference]: With dead ends: 57 [2021-05-06 10:27:24,393 INFO L226 Difference]: Without dead ends: 54 [2021-05-06 10:27:24,393 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 72.5ms TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-05-06 10:27:24,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-06 10:27:24,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-05-06 10:27:24,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 11 states have call successors, (11), 8 states have call predecessors, (11), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 10:27:24,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2021-05-06 10:27:24,407 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 58 [2021-05-06 10:27:24,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:27:24,407 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2021-05-06 10:27:24,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-05-06 10:27:24,407 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2021-05-06 10:27:24,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-06 10:27:24,408 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:27:24,408 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:27:24,608 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:24,609 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:27:24,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:27:24,609 INFO L82 PathProgramCache]: Analyzing trace with hash 270583808, now seen corresponding path program 6 times [2021-05-06 10:27:24,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:27:24,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883964486] [2021-05-06 10:27:24,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:27:24,614 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:27:24,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1025978590] [2021-05-06 10:27:24,614 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:24,688 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-06 10:27:24,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:27:24,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 10:27:24,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:27:24,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:24,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:24,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:24,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:24,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:24,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:24,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:24,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:24,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:24,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:24,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:24,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:24,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:24,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:24,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:24,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:24,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:24,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:24,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:24,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:24,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:24,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:24,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:24,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:24,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:24,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:24,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:24,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:24,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:24,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:24,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:24,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:24,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:24,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:24,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:24,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:24,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:24,859 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-05-06 10:27:24,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:27:24,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883964486] [2021-05-06 10:27:24,860 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:27:24,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025978590] [2021-05-06 10:27:24,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025978590] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:27:24,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:27:24,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-06 10:27:24,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471883288] [2021-05-06 10:27:24,860 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 10:27:24,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:27:24,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 10:27:24,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-06 10:27:24,861 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2021-05-06 10:27:24,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:27:24,908 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2021-05-06 10:27:24,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 10:27:24,909 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 65 [2021-05-06 10:27:24,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:27:24,909 INFO L225 Difference]: With dead ends: 46 [2021-05-06 10:27:24,909 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 10:27:24,909 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 60.3ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-05-06 10:27:24,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 10:27:24,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 10:27:24,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 10:27:24,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 10:27:24,910 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 65 [2021-05-06 10:27:24,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:27:24,910 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 10:27:24,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2021-05-06 10:27:24,910 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 10:27:24,910 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 10:27:25,127 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 10:27:25,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 10:27:25 BasicIcfg [2021-05-06 10:27:25,132 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 10:27:25,133 INFO L168 Benchmark]: Toolchain (without parser) took 12505.68 ms. Allocated memory was 172.0 MB in the beginning and 206.6 MB in the end (delta: 34.6 MB). Free memory was 137.8 MB in the beginning and 185.9 MB in the end (delta: -48.2 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 10:27:25,133 INFO L168 Benchmark]: CDTParser took 0.47 ms. Allocated memory is still 172.0 MB. Free memory is still 154.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 10:27:25,133 INFO L168 Benchmark]: CACSL2BoogieTranslator took 216.15 ms. Allocated memory is still 172.0 MB. Free memory was 137.7 MB in the beginning and 156.1 MB in the end (delta: -18.5 MB). Peak memory consumption was 11.9 MB. Max. memory is 8.0 GB. [2021-05-06 10:27:25,133 INFO L168 Benchmark]: Boogie Preprocessor took 37.83 ms. Allocated memory is still 172.0 MB. Free memory was 156.1 MB in the beginning and 154.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 10:27:25,133 INFO L168 Benchmark]: RCFGBuilder took 268.54 ms. Allocated memory is still 172.0 MB. Free memory was 154.3 MB in the beginning and 139.4 MB in the end (delta: 15.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-06 10:27:25,133 INFO L168 Benchmark]: IcfgTransformer took 27.29 ms. Allocated memory is still 172.0 MB. Free memory was 139.4 MB in the beginning and 137.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 10:27:25,133 INFO L168 Benchmark]: TraceAbstraction took 11950.07 ms. Allocated memory was 172.0 MB in the beginning and 206.6 MB in the end (delta: 34.6 MB). Free memory was 137.3 MB in the beginning and 185.9 MB in the end (delta: -48.7 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 10:27:25,133 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.47 ms. Allocated memory is still 172.0 MB. Free memory is still 154.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 216.15 ms. Allocated memory is still 172.0 MB. Free memory was 137.7 MB in the beginning and 156.1 MB in the end (delta: -18.5 MB). Peak memory consumption was 11.9 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 37.83 ms. Allocated memory is still 172.0 MB. Free memory was 156.1 MB in the beginning and 154.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 268.54 ms. Allocated memory is still 172.0 MB. Free memory was 154.3 MB in the beginning and 139.4 MB in the end (delta: 15.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 27.29 ms. Allocated memory is still 172.0 MB. Free memory was 139.4 MB in the beginning and 137.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 11950.07 ms. Allocated memory was 172.0 MB in the beginning and 206.6 MB in the end (delta: 34.6 MB). Free memory was 137.3 MB in the beginning and 185.9 MB in the end (delta: -48.7 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: 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 5 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 11904.5ms, OverallIterations: 11, TraceHistogramMax: 8, EmptinessCheckTime: 17.9ms, AutomataDifference: 7291.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 4.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 310 SDtfs, 68 SDslu, 1332 SDs, 0 SdLazy, 602 SolverSat, 24 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 6987.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 408 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 510.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=10, InterpolantAutomatonStates: 84, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 58.9ms AutomataMinimizationTime, 11 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 75.4ms SsaConstructionTime, 381.1ms SatisfiabilityAnalysisTime, 1417.3ms InterpolantComputationTime, 412 NumberOfCodeBlocks, 396 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 401 ConstructedInterpolants, 0 QuantifiedInterpolants, 1312 SizeOfPredicates, 17 NumberOfNonLiveVariables, 1472 ConjunctsInSsa, 158 ConjunctsInUnsatCore, 11 InterpolantComputations, 3 PerfectInterpolantSequences, 383/498 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...