/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_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:58:27,565 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:58:27,567 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:58:27,591 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:58:27,592 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:58:27,593 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:58:27,594 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:58:27,596 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:58:27,597 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:58:27,598 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:58:27,598 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:58:27,599 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:58:27,600 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:58:27,601 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:58:27,602 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:58:27,603 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:58:27,603 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:58:27,604 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:58:27,606 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:58:27,607 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:58:27,608 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:58:27,609 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:58:27,610 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:58:27,611 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:58:27,613 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:58:27,633 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:58:27,634 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:58:27,634 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:58:27,637 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:58:27,656 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:58:27,657 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:58:27,659 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:58:27,660 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:58:27,660 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:58:27,660 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:58:27,661 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:58:27,661 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:58:27,661 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:58:27,661 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:58:27,662 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:58:27,662 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:58:27,662 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:58:27,662 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:58:27,663 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:58:27,663 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:58:27,663 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:58:27,663 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:58:27,663 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:58:27,663 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:58:27,664 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:58:27,665 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:58:27,665 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:58:28,006 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:58:28,035 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:58:28,037 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:58:28,038 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:58:28,039 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:58:28,039 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound2.c [2021-05-02 20:58:28,097 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/693221f72/9e3f6b7d0a394f3a860188785b5b4693/FLAGc4d2d6193 [2021-05-02 20:58:28,509 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:58:28,509 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound2.c [2021-05-02 20:58:28,515 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/693221f72/9e3f6b7d0a394f3a860188785b5b4693/FLAGc4d2d6193 [2021-05-02 20:58:28,925 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/693221f72/9e3f6b7d0a394f3a860188785b5b4693 [2021-05-02 20:58:28,927 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:58:28,929 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:58:28,933 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:58:28,933 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:58:28,937 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:58:28,937 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:58:28" (1/1) ... [2021-05-02 20:58:28,938 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32343f38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:58:28, skipping insertion in model container [2021-05-02 20:58:28,938 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:58:28" (1/1) ... [2021-05-02 20:58:28,944 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:58:28,957 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:58:29,070 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_valuebound2.c[545,558] [2021-05-02 20:58:29,084 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:58:29,090 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:58:29,107 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_valuebound2.c[545,558] [2021-05-02 20:58:29,113 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:58:29,124 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:58:29,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:58:29 WrapperNode [2021-05-02 20:58:29,125 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:58:29,126 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:58:29,126 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:58:29,126 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:58:29,135 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:58:29" (1/1) ... [2021-05-02 20:58:29,135 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:58:29" (1/1) ... [2021-05-02 20:58:29,161 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:58:29" (1/1) ... [2021-05-02 20:58:29,162 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:58:29" (1/1) ... [2021-05-02 20:58:29,166 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:58:29" (1/1) ... [2021-05-02 20:58:29,195 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:58:29" (1/1) ... [2021-05-02 20:58:29,204 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:58:29" (1/1) ... [2021-05-02 20:58:29,205 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:58:29,206 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:58:29,206 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:58:29,206 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:58:29,207 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:58:29" (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 20:58:29,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:58:29,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:58:29,292 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:58:29,292 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:58:29,292 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:58:29,293 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:58:29,293 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:58:29,293 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:58:29,293 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:58:29,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:58:29,293 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 20:58:29,293 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:58:29,293 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:58:29,294 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:58:29,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:58:29,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:58:29,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:58:29,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:58:29,294 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:58:29,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:58:29,474 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:58:29,475 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 20:58:29,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:58:29 BoogieIcfgContainer [2021-05-02 20:58:29,476 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:58:29,477 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:58:29,477 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:58:29,478 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:58:29,480 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:58:29" (1/1) ... [2021-05-02 20:58:29,496 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:58:29 BasicIcfg [2021-05-02 20:58:29,496 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:58:29,498 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:58:29,498 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:58:29,500 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:58:29,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:58:28" (1/4) ... [2021-05-02 20:58:29,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ae40db2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:58:29, skipping insertion in model container [2021-05-02 20:58:29,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:58:29" (2/4) ... [2021-05-02 20:58:29,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ae40db2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:58:29, skipping insertion in model container [2021-05-02 20:58:29,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:58:29" (3/4) ... [2021-05-02 20:58:29,502 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ae40db2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:58:29, skipping insertion in model container [2021-05-02 20:58:29,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:58:29" (4/4) ... [2021-05-02 20:58:29,502 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_valuebound2.cJordan [2021-05-02 20:58:29,506 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:58:29,510 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:58:29,527 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:58:29,563 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:58:29,563 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:58:29,563 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:58:29,563 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:58:29,563 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:58:29,564 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:58:29,564 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:58:29,564 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:58:29,594 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 20:58:29,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 20:58:29,605 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:58:29,605 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 20:58:29,606 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:58:29,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:58:29,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1011787902, now seen corresponding path program 1 times [2021-05-02 20:58:29,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:58:29,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850482676] [2021-05-02 20:58:29,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:58:29,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:58:29,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:58:29,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:58:29,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:58:29,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:58:29,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:58:29,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:58:29,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 20:58:29,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:58:29,919 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 20:58:29,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:58:29,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850482676] [2021-05-02 20:58:29,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850482676] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:58:29,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:58:29,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:58:29,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122307964] [2021-05-02 20:58:29,926 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:58:29,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:58:29,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:58:29,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:58:29,941 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 20:58:30,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:58:30,075 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-02 20:58:30,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:58:30,077 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 20:58:30,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:58:30,083 INFO L225 Difference]: With dead ends: 38 [2021-05-02 20:58:30,083 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 20:58:30,086 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 61.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:58:30,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 20:58:30,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-02 20:58:30,138 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 20:58:30,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-05-02 20:58:30,141 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2021-05-02 20:58:30,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:58:30,142 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-05-02 20:58:30,142 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 20:58:30,142 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-05-02 20:58:30,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 20:58:30,144 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:58:30,144 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 20:58:30,145 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:58:30,145 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:58:30,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:58:30,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1710049411, now seen corresponding path program 1 times [2021-05-02 20:58:30,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:58:30,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260699099] [2021-05-02 20:58:30,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:58:30,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:58:30,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:58:30,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:58:30,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:58:30,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:58:30,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:58:30,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:58:30,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 20:58:30,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:58:30,325 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 20:58:30,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:58:30,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260699099] [2021-05-02 20:58:30,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260699099] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:58:30,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:58:30,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 20:58:30,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994973597] [2021-05-02 20:58:30,327 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:58:30,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:58:30,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:58:30,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:58:30,328 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 20:58:30,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:58:30,590 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2021-05-02 20:58:30,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:58:30,590 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 20:58:30,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:58:30,591 INFO L225 Difference]: With dead ends: 44 [2021-05-02 20:58:30,592 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 20:58:30,592 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 123.0ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:58:30,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 20:58:30,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-02 20:58:30,599 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 20:58:30,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-02 20:58:30,600 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2021-05-02 20:58:30,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:58:30,600 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-02 20:58:30,601 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 20:58:30,601 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-02 20:58:30,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:58:30,602 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:58:30,602 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 20:58:30,602 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 20:58:30,602 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:58:30,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:58:30,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1042498848, now seen corresponding path program 1 times [2021-05-02 20:58:30,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:58:30,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568206013] [2021-05-02 20:58:30,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:58:30,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:58:30,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:58:30,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:58:30,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:58:30,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:58:30,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:58:30,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:58:30,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 20:58:30,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:58:30,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-02 20:58:30,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:58:30,821 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 20:58:30,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:58:30,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568206013] [2021-05-02 20:58:30,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568206013] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:58:30,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:58:30,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 20:58:30,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024319659] [2021-05-02 20:58:30,822 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:58:30,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:58:30,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:58:30,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:58:30,823 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 20:58:31,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:58:31,130 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2021-05-02 20:58:31,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:58:31,130 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 20:58:31,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:58:31,132 INFO L225 Difference]: With dead ends: 48 [2021-05-02 20:58:31,133 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 20:58:31,133 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 190.1ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:58:31,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 20:58:31,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2021-05-02 20:58:31,145 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 20:58:31,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-05-02 20:58:31,149 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2021-05-02 20:58:31,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:58:31,149 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-05-02 20:58:31,149 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 20:58:31,150 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-05-02 20:58:31,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 20:58:31,151 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:58:31,152 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 20:58:31,152 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 20:58:31,152 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:58:31,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:58:31,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1436069466, now seen corresponding path program 1 times [2021-05-02 20:58:31,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:58:31,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159917444] [2021-05-02 20:58:31,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:58:31,186 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:58:31,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1031322783] [2021-05-02 20:58:31,187 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 20:58:31,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:58:31,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 20:58:31,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:58:31,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:31,468 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-02 20:58:31,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:58:31,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159917444] [2021-05-02 20:58:31,469 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:58:31,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031322783] [2021-05-02 20:58:31,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031322783] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:58:31,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:58:31,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:58:31,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179239878] [2021-05-02 20:58:31,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:58:31,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:58:31,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:58:31,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:58:31,471 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) 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), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 20:58:31,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:58:31,587 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2021-05-02 20:58:31,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:58:31,592 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2021-05-02 20:58:31,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:58:31,594 INFO L225 Difference]: With dead ends: 56 [2021-05-02 20:58:31,594 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 20:58:31,594 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 40.6ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:58:31,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 20:58:31,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-02 20:58:31,597 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 20:58:31,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2021-05-02 20:58:31,598 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 38 [2021-05-02 20:58:31,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:58:31,598 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2021-05-02 20:58:31,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 20:58:31,599 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2021-05-02 20:58:31,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 20:58:31,600 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:58:31,600 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 20:58:31,822 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:58:31,823 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:58:31,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:58:31,823 INFO L82 PathProgramCache]: Analyzing trace with hash 5711864, now seen corresponding path program 1 times [2021-05-02 20:58:31,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:58:31,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753775681] [2021-05-02 20:58:31,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:58:31,842 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:58:31,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2108175870] [2021-05-02 20:58:31,842 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 20:58:31,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:58:31,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 20:58:31,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:58:31,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:31,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:31,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:31,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:32,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:32,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:32,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:32,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:32,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:32,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:32,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:32,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:32,072 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 20:58:32,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:58:32,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753775681] [2021-05-02 20:58:32,072 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:58:32,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108175870] [2021-05-02 20:58:32,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108175870] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:58:32,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:58:32,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:58:32,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713751557] [2021-05-02 20:58:32,073 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:58:32,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:58:32,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:58:32,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:58:32,074 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 20:58:32,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:58:32,181 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2021-05-02 20:58:32,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:58:32,182 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 20:58:32,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:58:32,187 INFO L225 Difference]: With dead ends: 66 [2021-05-02 20:58:32,187 INFO L226 Difference]: Without dead ends: 61 [2021-05-02 20:58:32,187 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 43.4ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:58:32,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-02 20:58:32,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2021-05-02 20:58:32,199 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 20:58:32,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2021-05-02 20:58:32,203 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 45 [2021-05-02 20:58:32,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:58:32,203 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2021-05-02 20:58:32,204 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 20:58:32,204 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2021-05-02 20:58:32,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 20:58:32,208 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:58:32,208 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 20:58:32,431 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:58:32,431 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:58:32,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:58:32,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1597443315, now seen corresponding path program 1 times [2021-05-02 20:58:32,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:58:32,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570405218] [2021-05-02 20:58:32,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:58:32,440 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:58:32,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1579629555] [2021-05-02 20:58:32,441 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 20:58:32,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:58:32,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 20:58:32,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:58:32,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:32,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:32,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:32,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:32,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:32,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:32,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:32,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:32,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:32,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:32,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:32,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:32,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:32,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:32,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:32,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:32,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:32,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:32,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:32,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:32,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:32,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:32,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:32,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:32,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:32,965 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 20:58:32,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:58:32,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570405218] [2021-05-02 20:58:32,966 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:58:32,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579629555] [2021-05-02 20:58:32,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579629555] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:58:32,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:58:32,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:58:32,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598275186] [2021-05-02 20:58:32,967 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:58:32,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:58:32,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:58:32,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:58:32,969 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 20:58:33,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:58:33,256 INFO L93 Difference]: Finished difference Result 73 states and 92 transitions. [2021-05-02 20:58:33,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:58:33,257 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 20:58:33,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:58:33,259 INFO L225 Difference]: With dead ends: 73 [2021-05-02 20:58:33,259 INFO L226 Difference]: Without dead ends: 73 [2021-05-02 20:58:33,259 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 134.2ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:58:33,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-02 20:58:33,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-05-02 20:58:33,264 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 20:58:33,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 92 transitions. [2021-05-02 20:58:33,265 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 92 transitions. Word has length 55 [2021-05-02 20:58:33,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:58:33,266 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 92 transitions. [2021-05-02 20:58:33,267 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 20:58:33,267 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 92 transitions. [2021-05-02 20:58:33,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 20:58:33,268 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:58:33,268 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 20:58:33,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:58:33,469 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:58:33,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:58:33,469 INFO L82 PathProgramCache]: Analyzing trace with hash 294687610, now seen corresponding path program 2 times [2021-05-02 20:58:33,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:58:33,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398071971] [2021-05-02 20:58:33,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:58:33,478 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:58:33,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [75490494] [2021-05-02 20:58:33,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:58:33,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:58:33,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:58:33,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-02 20:58:33,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:58:33,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:33,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:33,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:33,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:33,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:33,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:33,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:33,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:33,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:33,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:33,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:33,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:33,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:33,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:33,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:33,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:33,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:33,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:34,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:34,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:34,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:34,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:34,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:34,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:34,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:34,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:34,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:49,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:49,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:50,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:50,548 WARN L159 QuantifierPusher]: Ignoring assumption.