/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/ps3-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 22:15:26,875 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 22:15:26,876 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 22:15:26,909 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 22:15:26,910 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 22:15:26,912 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 22:15:26,914 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 22:15:26,918 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 22:15:26,920 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 22:15:26,923 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 22:15:26,924 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 22:15:26,925 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 22:15:26,925 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 22:15:26,927 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 22:15:26,928 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 22:15:26,929 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 22:15:26,931 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 22:15:26,931 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 22:15:26,933 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 22:15:26,937 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 22:15:26,939 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 22:15:26,940 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 22:15:26,941 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 22:15:26,943 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 22:15:26,947 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 22:15:26,953 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 22:15:26,953 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 22:15:26,954 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 22:15:26,957 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 22:15:26,968 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 22:15:26,968 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 22:15:26,970 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 22:15:26,970 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 22:15:26,970 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 22:15:26,970 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 22:15:26,970 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 22:15:26,970 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 22:15:26,971 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 22:15:26,971 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 22:15:26,971 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 22:15:26,971 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 22:15:26,972 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 22:15:26,972 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 22:15:26,972 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 22:15:26,972 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 22:15:26,972 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 22:15:26,972 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 22:15:26,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 22:15:26,972 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 22:15:26,973 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 22:15:26,973 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 22:15:26,973 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 22:15:27,238 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 22:15:27,259 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 22:15:27,261 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 22:15:27,262 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 22:15:27,262 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 22:15:27,263 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps3-ll_valuebound5.c [2021-05-02 22:15:27,313 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b351d87b9/e0155cc0799a4ac88a8bef54fe234802/FLAGcaf0ced19 [2021-05-02 22:15:27,698 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 22:15:27,698 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps3-ll_valuebound5.c [2021-05-02 22:15:27,703 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b351d87b9/e0155cc0799a4ac88a8bef54fe234802/FLAGcaf0ced19 [2021-05-02 22:15:27,717 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b351d87b9/e0155cc0799a4ac88a8bef54fe234802 [2021-05-02 22:15:27,719 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 22:15:27,721 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 22:15:27,725 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 22:15:27,725 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 22:15:27,728 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 22:15:27,729 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:15:27" (1/1) ... [2021-05-02 22:15:27,729 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5208b1c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:15:27, skipping insertion in model container [2021-05-02 22:15:27,729 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:15:27" (1/1) ... [2021-05-02 22:15:27,734 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 22:15:27,744 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 22:15:27,861 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/ps3-ll_valuebound5.c[458,471] [2021-05-02 22:15:27,873 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:15:27,878 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 22:15:27,897 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/ps3-ll_valuebound5.c[458,471] [2021-05-02 22:15:27,922 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:15:27,931 INFO L208 MainTranslator]: Completed translation [2021-05-02 22:15:27,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:15:27 WrapperNode [2021-05-02 22:15:27,931 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 22:15:27,932 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 22:15:27,932 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 22:15:27,932 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 22:15:27,940 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:15:27" (1/1) ... [2021-05-02 22:15:27,941 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:15:27" (1/1) ... [2021-05-02 22:15:27,947 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:15:27" (1/1) ... [2021-05-02 22:15:27,947 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:15:27" (1/1) ... [2021-05-02 22:15:27,958 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:15:27" (1/1) ... [2021-05-02 22:15:27,961 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:15:27" (1/1) ... [2021-05-02 22:15:27,962 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:15:27" (1/1) ... [2021-05-02 22:15:27,968 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 22:15:27,969 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 22:15:27,969 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 22:15:27,969 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 22:15:27,970 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:15:27" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 22:15:28,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 22:15:28,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 22:15:28,024 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 22:15:28,024 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 22:15:28,024 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 22:15:28,024 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 22:15:28,024 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 22:15:28,024 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 22:15:28,025 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 22:15:28,025 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 22:15:28,025 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-02 22:15:28,025 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 22:15:28,025 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 22:15:28,025 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 22:15:28,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 22:15:28,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 22:15:28,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 22:15:28,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 22:15:28,026 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 22:15:28,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 22:15:28,212 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 22:15:28,212 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 22:15:28,213 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:15:28 BoogieIcfgContainer [2021-05-02 22:15:28,213 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 22:15:28,213 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 22:15:28,213 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 22:15:28,214 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 22:15:28,216 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:15:28" (1/1) ... [2021-05-02 22:15:28,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:15:28 BasicIcfg [2021-05-02 22:15:28,243 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 22:15:28,244 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 22:15:28,244 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 22:15:28,246 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 22:15:28,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 10:15:27" (1/4) ... [2021-05-02 22:15:28,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ec63f45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:15:28, skipping insertion in model container [2021-05-02 22:15:28,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:15:27" (2/4) ... [2021-05-02 22:15:28,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ec63f45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:15:28, skipping insertion in model container [2021-05-02 22:15:28,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:15:28" (3/4) ... [2021-05-02 22:15:28,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ec63f45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 10:15:28, skipping insertion in model container [2021-05-02 22:15:28,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:15:28" (4/4) ... [2021-05-02 22:15:28,248 INFO L111 eAbstractionObserver]: Analyzing ICFG ps3-ll_valuebound5.cJordan [2021-05-02 22:15:28,251 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 22:15:28,254 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 22:15:28,285 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 22:15:28,299 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 22:15:28,299 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 22:15:28,299 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 22:15:28,299 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 22:15:28,299 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 22:15:28,299 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 22:15:28,299 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 22:15:28,299 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 22:15:28,308 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 22:15:28,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 22:15:28,312 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:15:28,312 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:15:28,313 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:15:28,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:15:28,316 INFO L82 PathProgramCache]: Analyzing trace with hash 409333534, now seen corresponding path program 1 times [2021-05-02 22:15:28,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:15:28,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283517852] [2021-05-02 22:15:28,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:15:28,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:15:28,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 22:15:28,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:15:28,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 22:15:28,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:15:28,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:15:28,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:15:28,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283517852] [2021-05-02 22:15:28,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283517852] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:15:28,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:15:28,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 22:15:28,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635494978] [2021-05-02 22:15:28,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 22:15:28,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:15:28,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 22:15:28,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:15:28,486 INFO L87 Difference]: Start difference. First operand has 27 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) 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) [2021-05-02 22:15:28,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:15:28,529 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2021-05-02 22:15:28,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 22:15:28,530 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 [2021-05-02 22:15:28,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:15:28,535 INFO L225 Difference]: With dead ends: 27 [2021-05-02 22:15:28,535 INFO L226 Difference]: Without dead ends: 22 [2021-05-02 22:15:28,536 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:15:28,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-02 22:15:28,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-05-02 22:15:28,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 22:15:28,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-05-02 22:15:28,556 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2021-05-02 22:15:28,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:15:28,556 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-05-02 22:15:28,556 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) [2021-05-02 22:15:28,557 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-05-02 22:15:28,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 22:15:28,557 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:15:28,557 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:15:28,557 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 22:15:28,558 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:15:28,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:15:28,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1396244096, now seen corresponding path program 1 times [2021-05-02 22:15:28,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:15:28,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516892703] [2021-05-02 22:15:28,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:15:28,569 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:15:28,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [761093686] [2021-05-02 22:15:28,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:15:28,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:15:28,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 22:15:28,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:15:28,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:15:28,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:15:28,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:15:28,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516892703] [2021-05-02 22:15:28,729 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:15:28,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761093686] [2021-05-02 22:15:28,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761093686] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:15:28,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:15:28,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 22:15:28,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24720724] [2021-05-02 22:15:28,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 22:15:28,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:15:28,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 22:15:28,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 22:15:28,735 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 22:15:28,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:15:28,798 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-05-02 22:15:28,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 22:15:28,798 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 22:15:28,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:15:28,799 INFO L225 Difference]: With dead ends: 30 [2021-05-02 22:15:28,799 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 22:15:28,801 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 38.7ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:15:28,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 22:15:28,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-02 22:15:28,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 22:15:28,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-05-02 22:15:28,809 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 17 [2021-05-02 22:15:28,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:15:28,811 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-05-02 22:15:28,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 22:15:28,812 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-05-02 22:15:28,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 22:15:28,813 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:15:28,813 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] [2021-05-02 22:15:29,030 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 22:15:29,031 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:15:29,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:15:29,031 INFO L82 PathProgramCache]: Analyzing trace with hash 279144821, now seen corresponding path program 1 times [2021-05-02 22:15:29,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:15:29,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474632878] [2021-05-02 22:15:29,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:15:29,047 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:15:29,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1973238323] [2021-05-02 22:15:29,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:15:29,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:15:29,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 22:15:29,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:15:29,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:15:29,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:15:29,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:15:29,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474632878] [2021-05-02 22:15:29,192 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:15:29,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973238323] [2021-05-02 22:15:29,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973238323] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:15:29,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:15:29,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 22:15:29,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439837493] [2021-05-02 22:15:29,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 22:15:29,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:15:29,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 22:15:29,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:15:29,193 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 22:15:29,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:15:29,257 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2021-05-02 22:15:29,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 22:15:29,258 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-05-02 22:15:29,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:15:29,259 INFO L225 Difference]: With dead ends: 37 [2021-05-02 22:15:29,259 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 22:15:29,259 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 45.0ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:15:29,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 22:15:29,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-02 22:15:29,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 22:15:29,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-05-02 22:15:29,263 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 24 [2021-05-02 22:15:29,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:15:29,263 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-05-02 22:15:29,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 22:15:29,263 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-05-02 22:15:29,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 22:15:29,264 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:15:29,264 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] [2021-05-02 22:15:29,469 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:15:29,469 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:15:29,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:15:29,470 INFO L82 PathProgramCache]: Analyzing trace with hash -522906656, now seen corresponding path program 2 times [2021-05-02 22:15:29,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:15:29,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943344460] [2021-05-02 22:15:29,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:15:29,478 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:15:29,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1391181262] [2021-05-02 22:15:29,478 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 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 [2021-05-02 22:15:29,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:15:29,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:15:29,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 22:15:29,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:15:29,727 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 22:15:29,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:15:29,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943344460] [2021-05-02 22:15:29,728 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:15:29,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391181262] [2021-05-02 22:15:29,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391181262] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:15:29,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:15:29,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 22:15:29,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438521716] [2021-05-02 22:15:29,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 22:15:29,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:15:29,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 22:15:29,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:15:29,729 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 22:15:29,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:15:29,796 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2021-05-02 22:15:29,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 22:15:29,797 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2021-05-02 22:15:29,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:15:29,797 INFO L225 Difference]: With dead ends: 44 [2021-05-02 22:15:29,797 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 22:15:29,798 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 53.0ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-02 22:15:29,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 22:15:29,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-02 22:15:29,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 29 states have internal predecessors, (30), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 22:15:29,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2021-05-02 22:15:29,801 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 31 [2021-05-02 22:15:29,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:15:29,801 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2021-05-02 22:15:29,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 22:15:29,802 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2021-05-02 22:15:29,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 22:15:29,802 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:15:29,802 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] [2021-05-02 22:15:30,019 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:15:30,020 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:15:30,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:15:30,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1704072427, now seen corresponding path program 3 times [2021-05-02 22:15:30,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:15:30,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331965954] [2021-05-02 22:15:30,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:15:30,027 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:15:30,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [357926125] [2021-05-02 22:15:30,027 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 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