/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-ll_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:53:19,821 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:53:19,823 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:53:19,850 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:53:19,850 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:53:19,851 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:53:19,853 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:53:19,854 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:53:19,855 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:53:19,856 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:53:19,857 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:53:19,858 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:53:19,858 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:53:19,859 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:53:19,860 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:53:19,861 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:53:19,861 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:53:19,862 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:53:19,863 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:53:19,865 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:53:19,866 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:53:19,870 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:53:19,870 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:53:19,871 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:53:19,873 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:53:19,880 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:53:19,881 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:53:19,881 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:53:19,889 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:53:19,910 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:53:19,910 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:53:19,913 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:53:19,913 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:53:19,913 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:53:19,913 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:53:19,913 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:53:19,913 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:53:19,914 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:53:19,914 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:53:19,914 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:53:19,915 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:53:19,915 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:53:19,915 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:53:19,915 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:53:19,915 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:53:19,915 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:53:19,915 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:53:19,916 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:53:19,916 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:53:19,916 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:53:19,917 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:53:19,917 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:53:20,248 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:53:20,264 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:53:20,267 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:53:20,268 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:53:20,268 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:53:20,269 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound2.c [2021-05-02 20:53:20,324 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15067beef/13528a33e63b4efdbe77fbddb21ea94e/FLAG15f88fc2d [2021-05-02 20:53:20,736 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:53:20,736 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound2.c [2021-05-02 20:53:20,742 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15067beef/13528a33e63b4efdbe77fbddb21ea94e/FLAG15f88fc2d [2021-05-02 20:53:21,134 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15067beef/13528a33e63b4efdbe77fbddb21ea94e [2021-05-02 20:53:21,136 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:53:21,138 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:53:21,139 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:53:21,139 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:53:21,143 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:53:21,143 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:53:21" (1/1) ... [2021-05-02 20:53:21,144 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b78793 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:53:21, skipping insertion in model container [2021-05-02 20:53:21,145 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:53:21" (1/1) ... [2021-05-02 20:53:21,152 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:53:21,166 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:53:21,277 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-ll_valuebound2.c[546,559] [2021-05-02 20:53:21,292 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:53:21,302 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:53:21,316 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-ll_valuebound2.c[546,559] [2021-05-02 20:53:21,325 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:53:21,339 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:53:21,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:53:21 WrapperNode [2021-05-02 20:53:21,340 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:53:21,341 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:53:21,342 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:53:21,342 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:53:21,358 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:53:21" (1/1) ... [2021-05-02 20:53:21,359 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:53:21" (1/1) ... [2021-05-02 20:53:21,368 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:53:21" (1/1) ... [2021-05-02 20:53:21,368 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:53:21" (1/1) ... [2021-05-02 20:53:21,372 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:53:21" (1/1) ... [2021-05-02 20:53:21,383 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:53:21" (1/1) ... [2021-05-02 20:53:21,384 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:53:21" (1/1) ... [2021-05-02 20:53:21,388 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:53:21,389 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:53:21,389 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:53:21,389 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:53:21,390 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:53:21" (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 20:53:21,468 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:53:21,468 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:53:21,469 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:53:21,469 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:53:21,469 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:53:21,469 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:53:21,469 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:53:21,470 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:53:21,470 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:53:21,470 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:53:21,471 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 20:53:21,471 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:53:21,471 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:53:21,471 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:53:21,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:53:21,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:53:21,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:53:21,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:53:21,472 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:53:21,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:53:21,673 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:53:21,674 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 20:53:21,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:53:21 BoogieIcfgContainer [2021-05-02 20:53:21,675 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:53:21,675 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:53:21,676 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:53:21,676 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:53:21,679 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:53:21" (1/1) ... [2021-05-02 20:53:21,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:53:21 BasicIcfg [2021-05-02 20:53:21,695 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:53:21,697 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:53:21,697 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:53:21,699 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:53:21,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:53:21" (1/4) ... [2021-05-02 20:53:21,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@470c08ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:53:21, skipping insertion in model container [2021-05-02 20:53:21,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:53:21" (2/4) ... [2021-05-02 20:53:21,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@470c08ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:53:21, skipping insertion in model container [2021-05-02 20:53:21,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:53:21" (3/4) ... [2021-05-02 20:53:21,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@470c08ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:53:21, skipping insertion in model container [2021-05-02 20:53:21,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:53:21" (4/4) ... [2021-05-02 20:53:21,701 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound2.cJordan [2021-05-02 20:53:21,706 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:53:21,709 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:53:21,740 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:53:21,772 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:53:21,772 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:53:21,772 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:53:21,772 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:53:21,772 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:53:21,772 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:53:21,772 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:53:21,772 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:53:21,800 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 20:53:21,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 20:53:21,807 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:53:21,807 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 20:53:21,808 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:53:21,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:53:21,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1011787902, now seen corresponding path program 1 times [2021-05-02 20:53:21,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:53:21,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271750575] [2021-05-02 20:53:21,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:53:21,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:53:22,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:53:22,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:53:22,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:53:22,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:53:22,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:53:22,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:53:22,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 20:53:22,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:53:22,129 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 20:53:22,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:53:22,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271750575] [2021-05-02 20:53:22,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271750575] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:53:22,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:53:22,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:53:22,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683146470] [2021-05-02 20:53:22,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:53:22,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:53:22,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:53:22,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:53:22,150 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 20:53:22,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:53:22,275 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-02 20:53:22,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:53:22,277 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 20:53:22,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:53:22,284 INFO L225 Difference]: With dead ends: 38 [2021-05-02 20:53:22,285 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 20:53:22,287 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 53.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:53:22,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 20:53:22,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-02 20:53:22,324 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 20:53:22,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-05-02 20:53:22,327 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2021-05-02 20:53:22,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:53:22,328 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-05-02 20:53:22,328 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 20:53:22,328 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-05-02 20:53:22,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 20:53:22,330 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:53:22,330 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 20:53:22,330 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:53:22,331 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:53:22,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:53:22,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1710049411, now seen corresponding path program 1 times [2021-05-02 20:53:22,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:53:22,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951602817] [2021-05-02 20:53:22,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:53:22,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:53:22,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:53:22,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:53:22,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:53:22,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:53:22,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:53:22,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:53:22,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 20:53:22,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:53:22,476 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 20:53:22,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:53:22,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951602817] [2021-05-02 20:53:22,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951602817] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:53:22,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:53:22,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 20:53:22,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345832589] [2021-05-02 20:53:22,478 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:53:22,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:53:22,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:53:22,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:53:22,480 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 20:53:22,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:53:22,727 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2021-05-02 20:53:22,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:53:22,728 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 20:53:22,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:53:22,729 INFO L225 Difference]: With dead ends: 44 [2021-05-02 20:53:22,729 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 20:53:22,730 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 118.0ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:53:22,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 20:53:22,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-02 20:53:22,736 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 20:53:22,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-02 20:53:22,737 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2021-05-02 20:53:22,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:53:22,738 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-02 20:53:22,738 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 20:53:22,738 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-02 20:53:22,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:53:22,739 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:53:22,739 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 20:53:22,739 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 20:53:22,739 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:53:22,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:53:22,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1042498848, now seen corresponding path program 1 times [2021-05-02 20:53:22,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:53:22,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798968653] [2021-05-02 20:53:22,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:53:22,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:53:22,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:53:22,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:53:22,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:53:22,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:53:22,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:53:22,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:53:22,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 20:53:22,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:53:22,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-02 20:53:22,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:53:22,837 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 20:53:22,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:53:22,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798968653] [2021-05-02 20:53:22,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798968653] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:53:22,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:53:22,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 20:53:22,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536329241] [2021-05-02 20:53:22,838 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:53:22,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:53:22,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:53:22,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:53:22,839 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 20:53:23,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:53:23,107 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2021-05-02 20:53:23,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:53:23,107 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 20:53:23,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:53:23,110 INFO L225 Difference]: With dead ends: 48 [2021-05-02 20:53:23,110 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 20:53:23,110 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 122.9ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:53:23,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 20:53:23,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2021-05-02 20:53:23,122 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 20:53:23,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-05-02 20:53:23,125 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2021-05-02 20:53:23,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:53:23,126 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-05-02 20:53:23,126 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 20:53:23,126 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-05-02 20:53:23,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 20:53:23,128 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:53:23,128 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 20:53:23,129 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 20:53:23,129 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:53:23,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:53:23,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1436069466, now seen corresponding path program 1 times [2021-05-02 20:53:23,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:53:23,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387425726] [2021-05-02 20:53:23,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:53:23,157 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:53:23,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1843415349] [2021-05-02 20:53:23,157 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 20:53:23,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:53:23,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 20:53:23,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:53:23,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:23,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:23,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:23,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:23,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:23,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:23,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:23,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:23,601 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-05-02 20:53:23,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:53:23,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387425726] [2021-05-02 20:53:23,601 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:53:23,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843415349] [2021-05-02 20:53:23,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843415349] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:53:23,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:53:23,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:53:23,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521060542] [2021-05-02 20:53:23,602 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:53:23,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:53:23,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:53:23,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:53:23,603 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 12 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-02 20:53:23,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:53:23,825 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2021-05-02 20:53:23,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:53:23,826 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 38 [2021-05-02 20:53:23,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:53:23,827 INFO L225 Difference]: With dead ends: 60 [2021-05-02 20:53:23,827 INFO L226 Difference]: Without dead ends: 59 [2021-05-02 20:53:23,827 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 111.0ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:53:23,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-02 20:53:23,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-05-02 20:53:23,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 20:53:23,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2021-05-02 20:53:23,833 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 38 [2021-05-02 20:53:23,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:53:23,834 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2021-05-02 20:53:23,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-02 20:53:23,834 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2021-05-02 20:53:23,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 20:53:23,835 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:53:23,835 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 20:53:24,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:53:24,061 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:53:24,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:53:24,062 INFO L82 PathProgramCache]: Analyzing trace with hash 5711864, now seen corresponding path program 1 times [2021-05-02 20:53:24,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:53:24,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042783419] [2021-05-02 20:53:24,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:53:24,070 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:53:24,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [724539636] [2021-05-02 20:53:24,071 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 20:53:24,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:53:24,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 20:53:24,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:53:24,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:24,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:24,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:24,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:24,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:24,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:24,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:24,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:24,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:24,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:24,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:24,441 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-02 20:53:24,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:53:24,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042783419] [2021-05-02 20:53:24,441 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:53:24,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724539636] [2021-05-02 20:53:24,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724539636] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:53:24,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:53:24,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-02 20:53:24,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969705019] [2021-05-02 20:53:24,442 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:53:24,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:53:24,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:53:24,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:53:24,444 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:53:24,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:53:24,622 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2021-05-02 20:53:24,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:53:24,622 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2021-05-02 20:53:24,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:53:24,623 INFO L225 Difference]: With dead ends: 67 [2021-05-02 20:53:24,623 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 20:53:24,624 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 115.4ms TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:53:24,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 20:53:24,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-02 20:53:24,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 35 states have internal predecessors, (38), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 20:53:24,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2021-05-02 20:53:24,629 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 45 [2021-05-02 20:53:24,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:53:24,629 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2021-05-02 20:53:24,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:53:24,629 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2021-05-02 20:53:24,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 20:53:24,630 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:53:24,630 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 20:53:24,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:53:24,845 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:53:24,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:53:24,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1597443315, now seen corresponding path program 1 times [2021-05-02 20:53:24,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:53:24,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486199344] [2021-05-02 20:53:24,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:53:24,858 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:53:24,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [754084594] [2021-05-02 20:53:24,859 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 20:53:24,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:53:24,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 20:53:24,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:53:25,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:25,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:25,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:25,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:25,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:25,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:25,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:25,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:25,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:25,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:25,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:25,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:25,215 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 26 proven. 12 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 20:53:25,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:53:25,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486199344] [2021-05-02 20:53:25,215 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:53:25,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754084594] [2021-05-02 20:53:25,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754084594] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:53:25,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:53:25,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:53:25,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713550489] [2021-05-02 20:53:25,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:53:25,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:53:25,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:53:25,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:53:25,217 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 20:53:25,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:53:25,507 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2021-05-02 20:53:25,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:53:25,507 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 55 [2021-05-02 20:53:25,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:53:25,509 INFO L225 Difference]: With dead ends: 82 [2021-05-02 20:53:25,509 INFO L226 Difference]: Without dead ends: 81 [2021-05-02 20:53:25,509 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 134.4ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:53:25,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-02 20:53:25,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-05-02 20:53:25,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 47 states have (on average 1.127659574468085) internal successors, (53), 49 states have internal predecessors, (53), 23 states have call successors, (23), 11 states have call predecessors, (23), 10 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 20:53:25,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 96 transitions. [2021-05-02 20:53:25,516 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 96 transitions. Word has length 55 [2021-05-02 20:53:25,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:53:25,517 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 96 transitions. [2021-05-02 20:53:25,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 20:53:25,517 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 96 transitions. [2021-05-02 20:53:25,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-02 20:53:25,518 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:53:25,518 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 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] [2021-05-02 20:53:25,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:53:25,733 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:53:25,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:53:25,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1292294975, now seen corresponding path program 1 times [2021-05-02 20:53:25,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:53:25,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502359080] [2021-05-02 20:53:25,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:53:25,741 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:53:25,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1264516209] [2021-05-02 20:53:25,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:53:25,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:53:25,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 20:53:25,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:53:25,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:25,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:25,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:25,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:25,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:25,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:25,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:25,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:25,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:25,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:26,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:26,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:26,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:26,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:26,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:26,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:26,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:26,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:26,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:26,233 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-05-02 20:53:26,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:53:26,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502359080] [2021-05-02 20:53:26,233 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:53:26,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264516209] [2021-05-02 20:53:26,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264516209] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:53:26,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:53:26,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:53:26,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051232825] [2021-05-02 20:53:26,234 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:53:26,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:53:26,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:53:26,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:53:26,235 INFO L87 Difference]: Start difference. First operand 81 states and 96 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 20:53:26,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:53:26,502 INFO L93 Difference]: Finished difference Result 89 states and 102 transitions. [2021-05-02 20:53:26,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:53:26,502 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 62 [2021-05-02 20:53:26,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:53:26,503 INFO L225 Difference]: With dead ends: 89 [2021-05-02 20:53:26,504 INFO L226 Difference]: Without dead ends: 84 [2021-05-02 20:53:26,504 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 168.4ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:53:26,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-02 20:53:26,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-05-02 20:53:26,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 52 states have internal predecessors, (56), 20 states have call successors, (20), 13 states have call predecessors, (20), 12 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 20:53:26,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2021-05-02 20:53:26,510 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 62 [2021-05-02 20:53:26,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:53:26,510 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2021-05-02 20:53:26,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 20:53:26,511 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2021-05-02 20:53:26,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 20:53:26,512 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:53:26,512 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 20:53:26,724 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:53:26,725 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:53:26,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:53:26,725 INFO L82 PathProgramCache]: Analyzing trace with hash 294687610, now seen corresponding path program 2 times [2021-05-02 20:53:26,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:53:26,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729057707] [2021-05-02 20:53:26,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:53:26,736 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:53:26,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1606031445] [2021-05-02 20:53:26,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:53:26,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:53:26,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:53:26,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 20:53:26,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:53:26,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:26,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:26,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:26,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:26,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:26,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:26,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:26,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:26,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:26,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:26,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:26,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:26,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:26,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:26,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:26,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:26,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:26,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:26,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:26,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:26,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:26,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:26,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:26,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:26,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:26,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:26,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:26,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:26,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:26,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:26,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:26,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:26,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:26,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:26,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:26,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:26,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:27,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:27,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:27,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:27,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:27,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:27,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:27,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:27,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:27,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:27,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:27,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:27,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:27,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:27,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:27,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:27,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:27,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:27,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:27,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:27,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:27,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:27,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:27,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:27,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:27,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:27,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:27,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:27,297 WARN L159 QuantifierPusher]: Ignoring assumption.