/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/hard-u_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 21:00:04,213 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 21:00:04,215 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 21:00:04,235 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 21:00:04,235 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 21:00:04,236 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 21:00:04,237 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 21:00:04,238 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 21:00:04,239 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 21:00:04,240 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 21:00:04,241 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 21:00:04,242 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 21:00:04,242 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 21:00:04,243 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 21:00:04,243 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 21:00:04,244 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 21:00:04,245 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 21:00:04,245 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 21:00:04,247 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 21:00:04,248 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 21:00:04,249 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 21:00:04,250 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 21:00:04,251 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 21:00:04,251 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 21:00:04,253 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 21:00:04,260 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 21:00:04,261 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 21:00:04,261 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 21:00:04,264 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 21:00:04,273 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 21:00:04,273 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 21:00:04,275 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 21:00:04,275 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 21:00:04,275 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 21:00:04,275 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 21:00:04,275 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 21:00:04,275 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 21:00:04,276 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 21:00:04,276 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 21:00:04,276 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 21:00:04,276 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 21:00:04,276 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 21:00:04,276 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 21:00:04,277 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 21:00:04,277 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 21:00:04,277 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 21:00:04,277 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 21:00:04,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 21:00:04,277 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 21:00:04,278 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 21:00:04,278 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 21:00:04,278 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 21:00:04,572 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 21:00:04,589 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 21:00:04,590 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 21:00:04,591 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 21:00:04,592 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 21:00:04,592 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound20.c [2021-05-02 21:00:04,631 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bcdb129a4/3600395a3dc4453c9f65afd49b7871d1/FLAG41db92ed2 [2021-05-02 21:00:04,979 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 21:00:04,980 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound20.c [2021-05-02 21:00:04,985 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bcdb129a4/3600395a3dc4453c9f65afd49b7871d1/FLAG41db92ed2 [2021-05-02 21:00:04,995 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bcdb129a4/3600395a3dc4453c9f65afd49b7871d1 [2021-05-02 21:00:04,996 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 21:00:04,998 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 21:00:04,999 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 21:00:04,999 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 21:00:05,002 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 21:00:05,002 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 09:00:04" (1/1) ... [2021-05-02 21:00:05,003 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bee51c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:00:05, skipping insertion in model container [2021-05-02 21:00:05,003 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 09:00:04" (1/1) ... [2021-05-02 21:00:05,010 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 21:00:05,023 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 21:00:05,155 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/hard-u_valuebound20.c[545,558] [2021-05-02 21:00:05,179 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 21:00:05,188 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 21:00:05,199 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/hard-u_valuebound20.c[545,558] [2021-05-02 21:00:05,213 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 21:00:05,225 INFO L208 MainTranslator]: Completed translation [2021-05-02 21:00:05,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:00:05 WrapperNode [2021-05-02 21:00:05,225 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 21:00:05,226 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 21:00:05,226 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 21:00:05,226 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 21:00:05,275 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:00:05" (1/1) ... [2021-05-02 21:00:05,276 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:00:05" (1/1) ... [2021-05-02 21:00:05,297 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:00:05" (1/1) ... [2021-05-02 21:00:05,297 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:00:05" (1/1) ... [2021-05-02 21:00:05,311 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:00:05" (1/1) ... [2021-05-02 21:00:05,314 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:00:05" (1/1) ... [2021-05-02 21:00:05,316 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:00:05" (1/1) ... [2021-05-02 21:00:05,317 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 21:00:05,318 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 21:00:05,318 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 21:00:05,318 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 21:00:05,318 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:00:05" (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 21:00:05,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 21:00:05,467 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 21:00:05,467 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 21:00:05,467 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 21:00:05,468 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 21:00:05,468 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 21:00:05,468 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 21:00:05,468 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 21:00:05,468 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 21:00:05,469 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 21:00:05,469 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 21:00:05,469 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 21:00:05,470 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 21:00:05,470 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 21:00:05,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 21:00:05,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 21:00:05,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 21:00:05,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 21:00:05,471 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 21:00:05,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 21:00:05,763 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 21:00:05,764 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 21:00:05,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 09:00:05 BoogieIcfgContainer [2021-05-02 21:00:05,765 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 21:00:05,765 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 21:00:05,765 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 21:00:05,766 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 21:00:05,768 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 09:00:05" (1/1) ... [2021-05-02 21:00:05,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 09:00:05 BasicIcfg [2021-05-02 21:00:05,796 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 21:00:05,797 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 21:00:05,797 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 21:00:05,799 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 21:00:05,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 09:00:04" (1/4) ... [2021-05-02 21:00:05,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15d18efb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 09:00:05, skipping insertion in model container [2021-05-02 21:00:05,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:00:05" (2/4) ... [2021-05-02 21:00:05,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15d18efb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 09:00:05, skipping insertion in model container [2021-05-02 21:00:05,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 09:00:05" (3/4) ... [2021-05-02 21:00:05,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15d18efb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 09:00:05, skipping insertion in model container [2021-05-02 21:00:05,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 09:00:05" (4/4) ... [2021-05-02 21:00:05,802 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_valuebound20.cJordan [2021-05-02 21:00:05,806 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 21:00:05,808 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 21:00:05,821 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 21:00:05,841 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 21:00:05,841 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 21:00:05,841 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 21:00:05,841 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 21:00:05,842 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 21:00:05,842 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 21:00:05,842 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 21:00:05,842 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 21:00:05,858 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 21:00:05,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 21:00:05,864 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:00:05,864 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:00:05,864 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:00:05,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:00:05,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1011787902, now seen corresponding path program 1 times [2021-05-02 21:00:05,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:00:05,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434113290] [2021-05-02 21:00:05,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:00:05,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:00:06,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 21:00:06,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:00:06,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 21:00:06,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:00:06,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 21:00:06,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:00:06,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 21:00:06,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:00:06,162 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 21:00:06,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:00:06,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434113290] [2021-05-02 21:00:06,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434113290] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 21:00:06,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 21:00:06,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 21:00:06,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393560858] [2021-05-02 21:00:06,168 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 21:00:06,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:00:06,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 21:00:06,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 21:00:06,182 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 21:00:06,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:00:06,278 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-02 21:00:06,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 21:00:06,280 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-02 21:00:06,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:00:06,286 INFO L225 Difference]: With dead ends: 38 [2021-05-02 21:00:06,286 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 21:00:06,287 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 63.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 21:00:06,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 21:00:06,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-02 21:00:06,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 21:00:06,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-05-02 21:00:06,310 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2021-05-02 21:00:06,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:00:06,311 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-05-02 21:00:06,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 21:00:06,311 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-05-02 21:00:06,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 21:00:06,312 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:00:06,312 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:00:06,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 21:00:06,312 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:00:06,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:00:06,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1710049411, now seen corresponding path program 1 times [2021-05-02 21:00:06,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:00:06,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174903869] [2021-05-02 21:00:06,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:00:06,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:00:06,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 21:00:06,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:00:06,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 21:00:06,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:00:06,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 21:00:06,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:00:06,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 21:00:06,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:00:06,413 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 21:00:06,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:00:06,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174903869] [2021-05-02 21:00:06,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174903869] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 21:00:06,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 21:00:06,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 21:00:06,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073157397] [2021-05-02 21:00:06,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 21:00:06,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:00:06,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 21:00:06,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 21:00:06,416 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-02 21:00:06,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:00:06,705 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2021-05-02 21:00:06,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 21:00:06,705 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2021-05-02 21:00:06,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:00:06,707 INFO L225 Difference]: With dead ends: 44 [2021-05-02 21:00:06,707 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 21:00:06,708 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 152.1ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 21:00:06,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 21:00:06,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-02 21:00:06,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 21:00:06,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-02 21:00:06,726 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2021-05-02 21:00:06,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:00:06,726 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-02 21:00:06,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-02 21:00:06,727 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-02 21:00:06,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 21:00:06,731 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:00:06,731 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:00:06,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 21:00:06,732 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:00:06,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:00:06,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1042498848, now seen corresponding path program 1 times [2021-05-02 21:00:06,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:00:06,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992774647] [2021-05-02 21:00:06,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:00:06,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:00:06,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 21:00:06,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:00:06,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 21:00:06,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:00:06,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 21:00:06,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:00:06,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 21:00:06,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:00:06,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-02 21:00:06,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:00:06,971 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 21:00:06,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:00:06,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992774647] [2021-05-02 21:00:06,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992774647] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 21:00:06,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 21:00:06,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 21:00:06,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388787251] [2021-05-02 21:00:06,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 21:00:06,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:00:06,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 21:00:06,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 21:00:06,974 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 21:00:07,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:00:07,367 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2021-05-02 21:00:07,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 21:00:07,367 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 21:00:07,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:00:07,368 INFO L225 Difference]: With dead ends: 48 [2021-05-02 21:00:07,368 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 21:00:07,369 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 226.6ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 21:00:07,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 21:00:07,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2021-05-02 21:00:07,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 21:00:07,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-05-02 21:00:07,377 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2021-05-02 21:00:07,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:00:07,378 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-05-02 21:00:07,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 21:00:07,378 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-05-02 21:00:07,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 21:00:07,378 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:00:07,379 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:00:07,379 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 21:00:07,379 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:00:07,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:00:07,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1436069466, now seen corresponding path program 1 times [2021-05-02 21:00:07,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:00:07,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746345907] [2021-05-02 21:00:07,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:00:07,401 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:00:07,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1186407822] [2021-05-02 21:00:07,401 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 21:00:07,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:00:07,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 21:00:07,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:00:07,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:07,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:07,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:07,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:07,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:07,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:07,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:07,651 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-02 21:00:07,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:00:07,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746345907] [2021-05-02 21:00:07,652 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:00:07,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186407822] [2021-05-02 21:00:07,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186407822] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:00:07,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:00:07,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 21:00:07,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98945450] [2021-05-02 21:00:07,653 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 21:00:07,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:00:07,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 21:00:07,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 21:00:07,654 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 21:00:07,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:00:07,783 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2021-05-02 21:00:07,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 21:00:07,784 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2021-05-02 21:00:07,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:00:07,785 INFO L225 Difference]: With dead ends: 56 [2021-05-02 21:00:07,785 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 21:00:07,786 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 48.6ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 21:00:07,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 21:00:07,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-02 21:00:07,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 21:00:07,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2021-05-02 21:00:07,792 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 38 [2021-05-02 21:00:07,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:00:07,793 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2021-05-02 21:00:07,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 21:00:07,793 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2021-05-02 21:00:07,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 21:00:07,794 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:00:07,794 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:00:08,018 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:00:08,018 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:00:08,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:00:08,019 INFO L82 PathProgramCache]: Analyzing trace with hash 5711864, now seen corresponding path program 1 times [2021-05-02 21:00:08,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:00:08,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924839178] [2021-05-02 21:00:08,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:00:08,031 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:00:08,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [464711601] [2021-05-02 21:00:08,032 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 21:00:08,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:00:08,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 21:00:08,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:00:08,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:08,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:08,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:08,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:08,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:08,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:08,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:08,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:08,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:08,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:08,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:08,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:08,325 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-02 21:00:08,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:00:08,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924839178] [2021-05-02 21:00:08,326 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:00:08,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464711601] [2021-05-02 21:00:08,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464711601] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:00:08,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:00:08,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 21:00:08,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104541403] [2021-05-02 21:00:08,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 21:00:08,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:00:08,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 21:00:08,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 21:00:08,327 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 21:00:08,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:00:08,445 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2021-05-02 21:00:08,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 21:00:08,445 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2021-05-02 21:00:08,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:00:08,446 INFO L225 Difference]: With dead ends: 66 [2021-05-02 21:00:08,446 INFO L226 Difference]: Without dead ends: 61 [2021-05-02 21:00:08,447 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 67.2ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 21:00:08,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-02 21:00:08,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2021-05-02 21:00:08,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 36 states have internal predecessors, (40), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 21:00:08,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2021-05-02 21:00:08,452 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 45 [2021-05-02 21:00:08,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:00:08,452 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2021-05-02 21:00:08,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 21:00:08,453 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2021-05-02 21:00:08,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 21:00:08,453 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:00:08,454 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:00:08,677 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:00:08,677 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:00:08,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:00:08,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1597443315, now seen corresponding path program 1 times [2021-05-02 21:00:08,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:00:08,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990409681] [2021-05-02 21:00:08,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:00:08,686 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:00:08,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [743886428] [2021-05-02 21:00:08,687 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 [2021-05-02 21:00:08,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:00:08,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 21:00:08,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:00:08,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:08,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:08,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:08,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:09,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:09,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:09,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:09,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:09,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:09,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:09,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:09,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:09,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:09,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:09,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:09,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:09,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:09,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:09,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:09,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:09,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:09,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:09,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:09,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:09,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:09,304 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-02 21:00:09,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:00:09,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990409681] [2021-05-02 21:00:09,304 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:00:09,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743886428] [2021-05-02 21:00:09,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743886428] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:00:09,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:00:09,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 21:00:09,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599420628] [2021-05-02 21:00:09,305 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 21:00:09,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:00:09,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 21:00:09,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 21:00:09,306 INFO L87 Difference]: Start difference. First operand 60 states and 74 transitions. Second operand has 11 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 21:00:09,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:00:09,620 INFO L93 Difference]: Finished difference Result 73 states and 92 transitions. [2021-05-02 21:00:09,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 21:00:09,621 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 55 [2021-05-02 21:00:09,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:00:09,623 INFO L225 Difference]: With dead ends: 73 [2021-05-02 21:00:09,623 INFO L226 Difference]: Without dead ends: 73 [2021-05-02 21:00:09,623 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 167.3ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 21:00:09,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-02 21:00:09,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-05-02 21:00:09,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 41 states have (on average 1.170731707317073) internal successors, (48), 43 states have internal predecessors, (48), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 21:00:09,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 92 transitions. [2021-05-02 21:00:09,629 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 92 transitions. Word has length 55 [2021-05-02 21:00:09,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:00:09,629 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 92 transitions. [2021-05-02 21:00:09,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 21:00:09,629 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 92 transitions. [2021-05-02 21:00:09,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 21:00:09,630 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:00:09,630 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:00:09,835 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:00:09,835 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:00:09,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:00:09,836 INFO L82 PathProgramCache]: Analyzing trace with hash 294687610, now seen corresponding path program 2 times [2021-05-02 21:00:09,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:00:09,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554820392] [2021-05-02 21:00:09,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:00:09,843 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:00:09,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [71965951] [2021-05-02 21:00:09,844 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 [2021-05-02 21:00:10,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 21:00:10,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 21:00:10,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-02 21:00:10,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:00:10,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:10,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:10,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:10,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:10,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:10,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:10,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:10,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:10,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:10,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:10,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:10,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:10,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:10,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:10,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:10,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:10,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:10,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:10,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:10,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:10,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:10,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:10,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:10,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:10,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:10,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:10,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:10,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:10,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:10,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:10,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:10,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:10,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:10,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:10,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:10,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:10,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:10,999 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-05-02 21:00:10,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:00:10,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554820392] [2021-05-02 21:00:10,999 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:00:11,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71965951] [2021-05-02 21:00:11,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71965951] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:00:11,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:00:11,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 21:00:11,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446998635] [2021-05-02 21:00:11,001 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 21:00:11,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:00:11,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 21:00:11,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-05-02 21:00:11,001 INFO L87 Difference]: Start difference. First operand 73 states and 92 transitions. Second operand has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 11 states have internal predecessors, (22), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2021-05-02 21:00:11,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:00:11,805 INFO L93 Difference]: Finished difference Result 86 states and 110 transitions. [2021-05-02 21:00:11,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 21:00:11,805 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 11 states have internal predecessors, (22), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) Word has length 72 [2021-05-02 21:00:11,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:00:11,807 INFO L225 Difference]: With dead ends: 86 [2021-05-02 21:00:11,807 INFO L226 Difference]: Without dead ends: 86 [2021-05-02 21:00:11,807 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 233.3ms TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-05-02 21:00:11,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-02 21:00:11,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-05-02 21:00:11,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 50 states have internal predecessors, (55), 28 states have call successors, (28), 10 states have call predecessors, (28), 9 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 21:00:11,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 109 transitions. [2021-05-02 21:00:11,813 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 109 transitions. Word has length 72 [2021-05-02 21:00:11,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:00:11,813 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 109 transitions. [2021-05-02 21:00:11,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 11 states have internal predecessors, (22), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2021-05-02 21:00:11,813 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 109 transitions. [2021-05-02 21:00:11,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 21:00:11,815 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:00:11,815 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:00:12,019 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:00:12,019 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:00:12,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:00:12,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1689231171, now seen corresponding path program 1 times [2021-05-02 21:00:12,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:00:12,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267115191] [2021-05-02 21:00:12,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:00:12,026 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:00:12,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [248911459] [2021-05-02 21:00:12,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-02 21:00:17,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:00:17,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-02 21:00:17,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:00:17,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:17,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:17,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:17,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:17,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:17,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:17,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:17,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:17,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:17,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:17,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:17,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:17,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:17,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:17,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:17,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:17,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:17,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:17,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:17,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:17,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:17,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:17,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:17,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:17,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:17,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:17,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:17,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:18,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:18,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:18,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:18,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:18,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:18,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:18,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:18,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:18,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:18,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:18,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:18,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:18,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:18,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:18,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:18,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:18,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:18,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:18,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:18,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:18,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:18,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:18,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:18,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:43,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:43,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:43,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:44,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:44,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:44,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:44,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:44,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:44,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:44,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:44,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:44,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:44,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:01:44,443 WARN L159 QuantifierPusher]: Ignoring assumption.