/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/egcd2-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:19:58,006 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:19:58,008 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:19:58,031 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 08:19:58,032 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 08:19:58,033 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 08:19:58,033 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 08:19:58,035 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 08:19:58,036 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 08:19:58,036 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 08:19:58,037 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 08:19:58,037 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 08:19:58,038 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:19:58,038 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:19:58,039 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:19:58,039 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:19:58,040 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:19:58,041 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:19:58,042 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:19:58,043 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:19:58,044 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:19:58,045 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:19:58,046 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:19:58,046 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:19:58,048 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 08:19:58,053 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:19:58,054 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:19:58,054 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:19:58,059 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:19:58,070 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:19:58,070 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:19:58,071 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:19:58,071 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:19:58,071 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:19:58,071 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:19:58,071 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:19:58,072 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:19:58,072 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:19:58,072 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:19:58,072 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:19:58,072 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:19:58,072 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:19:58,072 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:19:58,073 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:19:58,073 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:19:58,073 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:19:58,073 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:19:58,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:19:58,073 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:19:58,073 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:19:58,074 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:19:58,074 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:19:58,435 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:19:58,479 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:19:58,481 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:19:58,482 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:19:58,483 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:19:58,483 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound5.c [2021-05-06 08:19:58,570 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a49dd160/057217d24e0647fe86aab15c37e8723b/FLAGc9a1351e6 [2021-05-06 08:19:59,078 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:19:59,078 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound5.c [2021-05-06 08:19:59,084 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a49dd160/057217d24e0647fe86aab15c37e8723b/FLAGc9a1351e6 [2021-05-06 08:19:59,554 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a49dd160/057217d24e0647fe86aab15c37e8723b [2021-05-06 08:19:59,556 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:19:59,565 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:19:59,566 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:19:59,567 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:19:59,583 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:19:59,584 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:19:59" (1/1) ... [2021-05-06 08:19:59,585 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cc3a82d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:19:59, skipping insertion in model container [2021-05-06 08:19:59,585 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:19:59" (1/1) ... [2021-05-06 08:19:59,593 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:19:59,621 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:19:59,829 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/egcd2-ll_valuebound5.c[490,503] [2021-05-06 08:19:59,869 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:19:59,874 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:19:59,941 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/egcd2-ll_valuebound5.c[490,503] [2021-05-06 08:19:59,961 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:19:59,972 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:19:59,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:19:59 WrapperNode [2021-05-06 08:19:59,981 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:19:59,982 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:19:59,982 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:19:59,982 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:20:00,003 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:19:59" (1/1) ... [2021-05-06 08:20:00,004 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:19:59" (1/1) ... [2021-05-06 08:20:00,014 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:19:59" (1/1) ... [2021-05-06 08:20:00,014 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:19:59" (1/1) ... [2021-05-06 08:20:00,025 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:19:59" (1/1) ... [2021-05-06 08:20:00,028 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:19:59" (1/1) ... [2021-05-06 08:20:00,029 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:19:59" (1/1) ... [2021-05-06 08:20:00,030 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:20:00,031 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:20:00,031 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:20:00,031 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:20:00,031 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:19:59" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:20:00,135 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:20:00,136 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:20:00,136 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:20:00,136 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:20:00,136 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:20:00,152 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:20:00,153 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:20:00,153 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:20:00,153 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:20:00,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:20:00,154 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 08:20:00,154 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:20:00,154 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:20:00,154 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:20:00,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:20:00,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:20:00,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:20:00,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:20:00,155 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:20:00,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:20:00,535 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:20:00,535 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 08:20:00,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:20:00 BoogieIcfgContainer [2021-05-06 08:20:00,562 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:20:00,563 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:20:00,563 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:20:00,563 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:20:00,565 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:20:00" (1/1) ... [2021-05-06 08:20:00,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:20:00 BasicIcfg [2021-05-06 08:20:00,578 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:20:00,579 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:20:00,579 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:20:00,582 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:20:00,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:19:59" (1/4) ... [2021-05-06 08:20:00,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38f0f308 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:20:00, skipping insertion in model container [2021-05-06 08:20:00,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:19:59" (2/4) ... [2021-05-06 08:20:00,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38f0f308 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:20:00, skipping insertion in model container [2021-05-06 08:20:00,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:20:00" (3/4) ... [2021-05-06 08:20:00,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38f0f308 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:20:00, skipping insertion in model container [2021-05-06 08:20:00,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:20:00" (4/4) ... [2021-05-06 08:20:00,586 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound5.cJordan [2021-05-06 08:20:00,590 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:20:00,593 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:20:00,605 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:20:00,641 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:20:00,641 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:20:00,641 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:20:00,642 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:20:00,642 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:20:00,642 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:20:00,642 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:20:00,642 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:20:00,654 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 08:20:00,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 08:20:00,681 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:00,682 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-05-06 08:20:00,683 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:00,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:00,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1630657446, now seen corresponding path program 1 times [2021-05-06 08:20:00,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:00,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480153365] [2021-05-06 08:20:00,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:00,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:01,017 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-06 08:20:01,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:20:01,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:01,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:20:01,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:01,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 08:20:01,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:01,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 08:20:01,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:01,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-06 08:20:01,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:01,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-05-06 08:20:01,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:01,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-05-06 08:20:01,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:01,114 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-06 08:20:01,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:01,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480153365] [2021-05-06 08:20:01,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480153365] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:20:01,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:20:01,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 08:20:01,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519261197] [2021-05-06 08:20:01,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 08:20:01,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:01,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 08:20:01,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:20:01,150 INFO L87 Difference]: Start difference. First operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:20:01,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:01,327 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2021-05-06 08:20:01,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 08:20:01,330 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2021-05-06 08:20:01,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:01,336 INFO L225 Difference]: With dead ends: 40 [2021-05-06 08:20:01,336 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 08:20:01,338 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 121.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:20:01,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 08:20:01,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 08:20:01,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 08:20:01,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2021-05-06 08:20:01,385 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2021-05-06 08:20:01,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:01,386 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2021-05-06 08:20:01,387 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:20:01,387 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2021-05-06 08:20:01,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 08:20:01,389 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:01,389 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-05-06 08:20:01,389 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 08:20:01,390 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:01,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:01,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1790145708, now seen corresponding path program 1 times [2021-05-06 08:20:01,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:01,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026961026] [2021-05-06 08:20:01,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:01,418 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:01,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [508956371] [2021-05-06 08:20:01,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:01,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:01,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:20:01,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:01,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:01,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:01,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:01,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:01,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:01,851 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-06 08:20:01,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:01,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026961026] [2021-05-06 08:20:01,852 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:01,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508956371] [2021-05-06 08:20:01,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508956371] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:01,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:01,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:20:01,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626698297] [2021-05-06 08:20:01,854 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:20:01,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:01,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:20:01,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:20:01,874 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:20:02,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:02,009 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2021-05-06 08:20:02,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:20:02,009 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2021-05-06 08:20:02,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:02,010 INFO L225 Difference]: With dead ends: 44 [2021-05-06 08:20:02,010 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 08:20:02,011 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 61.2ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:20:02,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 08:20:02,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-06 08:20:02,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 08:20:02,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2021-05-06 08:20:02,025 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 44 [2021-05-06 08:20:02,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:02,025 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2021-05-06 08:20:02,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:20:02,025 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2021-05-06 08:20:02,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-06 08:20:02,026 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:02,026 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1] [2021-05-06 08:20:02,245 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 08:20:02,246 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:02,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:02,246 INFO L82 PathProgramCache]: Analyzing trace with hash 375385207, now seen corresponding path program 1 times [2021-05-06 08:20:02,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:02,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626043482] [2021-05-06 08:20:02,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:02,260 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:02,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [699897725] [2021-05-06 08:20:02,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:02,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:02,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:20:02,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:02,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:02,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:02,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:02,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:02,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:02,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:02,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:02,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:02,687 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-06 08:20:02,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:02,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626043482] [2021-05-06 08:20:02,688 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:02,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699897725] [2021-05-06 08:20:02,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699897725] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:02,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:02,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:20:02,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14236516] [2021-05-06 08:20:02,689 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:20:02,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:02,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:20:02,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:20:02,690 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:20:02,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:02,911 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2021-05-06 08:20:02,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:20:02,912 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2021-05-06 08:20:02,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:02,918 INFO L225 Difference]: With dead ends: 55 [2021-05-06 08:20:02,918 INFO L226 Difference]: Without dead ends: 55 [2021-05-06 08:20:02,918 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 123.9ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:20:02,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-06 08:20:02,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2021-05-06 08:20:02,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 08:20:02,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2021-05-06 08:20:02,924 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 45 [2021-05-06 08:20:02,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:02,924 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2021-05-06 08:20:02,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:20:02,924 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2021-05-06 08:20:02,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 08:20:02,925 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:02,925 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 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, 1, 1, 1, 1] [2021-05-06 08:20:03,126 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:03,127 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:03,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:03,127 INFO L82 PathProgramCache]: Analyzing trace with hash -788787523, now seen corresponding path program 1 times [2021-05-06 08:20:03,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:03,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095087623] [2021-05-06 08:20:03,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:03,166 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:03,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1735220854] [2021-05-06 08:20:03,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:03,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:03,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:20:03,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:03,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:03,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:03,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:03,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:03,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:03,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:03,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:03,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:03,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:03,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:03,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:03,529 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-06 08:20:03,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:03,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095087623] [2021-05-06 08:20:03,529 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:03,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735220854] [2021-05-06 08:20:03,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735220854] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:03,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:03,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:20:03,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752075895] [2021-05-06 08:20:03,530 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:20:03,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:03,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:20:03,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:20:03,541 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 08:20:03,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:03,740 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2021-05-06 08:20:03,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:20:03,740 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 50 [2021-05-06 08:20:03,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:03,742 INFO L225 Difference]: With dead ends: 54 [2021-05-06 08:20:03,742 INFO L226 Difference]: Without dead ends: 54 [2021-05-06 08:20:03,742 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 60.2ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:20:03,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-06 08:20:03,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-05-06 08:20:03,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 30 states have internal predecessors, (32), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 08:20:03,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2021-05-06 08:20:03,754 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 50 [2021-05-06 08:20:03,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:03,754 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2021-05-06 08:20:03,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 08:20:03,758 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2021-05-06 08:20:03,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-06 08:20:03,759 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:03,761 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:03,962 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:03,962 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:03,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:03,963 INFO L82 PathProgramCache]: Analyzing trace with hash -735644649, now seen corresponding path program 1 times [2021-05-06 08:20:03,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:03,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520735045] [2021-05-06 08:20:03,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:03,972 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:03,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [983904387] [2021-05-06 08:20:03,972 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 [2021-05-06 08:20:04,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:04,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:20:04,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:04,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:04,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:04,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:04,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:04,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:04,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:04,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:04,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:04,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:04,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:04,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:04,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:04,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:04,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:04,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:04,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:04,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:04,303 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 08:20:04,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:04,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520735045] [2021-05-06 08:20:04,303 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:04,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983904387] [2021-05-06 08:20:04,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983904387] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:04,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:04,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:20:04,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226007927] [2021-05-06 08:20:04,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:20:04,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:04,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:20:04,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:20:04,305 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 08:20:04,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:04,442 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2021-05-06 08:20:04,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:20:04,443 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 55 [2021-05-06 08:20:04,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:04,444 INFO L225 Difference]: With dead ends: 58 [2021-05-06 08:20:04,444 INFO L226 Difference]: Without dead ends: 58 [2021-05-06 08:20:04,445 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 43.9ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:20:04,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-06 08:20:04,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-05-06 08:20:04,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 33 states have internal predecessors, (35), 19 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 08:20:04,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2021-05-06 08:20:04,452 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 55 [2021-05-06 08:20:04,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:04,453 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2021-05-06 08:20:04,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 08:20:04,453 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2021-05-06 08:20:04,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-06 08:20:04,480 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:04,480 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 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, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:04,684 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:04,685 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:04,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:04,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1700404515, now seen corresponding path program 1 times [2021-05-06 08:20:04,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:04,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817309877] [2021-05-06 08:20:04,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:04,706 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:04,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1576273534] [2021-05-06 08:20:04,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:04,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:04,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 08:20:04,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:05,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:05,044 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-05-06 08:20:05,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:05,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817309877] [2021-05-06 08:20:05,045 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:05,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576273534] [2021-05-06 08:20:05,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576273534] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:05,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:05,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:20:05,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105172069] [2021-05-06 08:20:05,047 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:20:05,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:05,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:20:05,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:20:05,048 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-05-06 08:20:05,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:05,187 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2021-05-06 08:20:05,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:20:05,188 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 60 [2021-05-06 08:20:05,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:05,192 INFO L225 Difference]: With dead ends: 62 [2021-05-06 08:20:05,192 INFO L226 Difference]: Without dead ends: 62 [2021-05-06 08:20:05,192 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 71.4ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:20:05,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-06 08:20:05,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-05-06 08:20:05,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 36 states have internal predecessors, (38), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 08:20:05,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2021-05-06 08:20:05,206 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 60 [2021-05-06 08:20:05,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:05,206 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2021-05-06 08:20:05,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-05-06 08:20:05,207 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2021-05-06 08:20:05,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-06 08:20:05,207 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:05,207 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:05,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 08:20:05,430 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:05,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:05,430 INFO L82 PathProgramCache]: Analyzing trace with hash 14033329, now seen corresponding path program 1 times [2021-05-06 08:20:05,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:05,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458769474] [2021-05-06 08:20:05,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:05,447 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:05,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [643684138] [2021-05-06 08:20:05,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:05,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:05,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-06 08:20:05,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:05,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:05,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:05,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:05,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:05,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:05,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:05,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:05,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:05,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:05,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:05,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:05,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:05,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:05,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:05,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:05,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:05,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:05,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:05,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:05,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:05,947 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-05-06 08:20:05,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:05,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458769474] [2021-05-06 08:20:05,947 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:05,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643684138] [2021-05-06 08:20:05,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643684138] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:05,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:05,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:20:05,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124081294] [2021-05-06 08:20:05,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:20:05,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:05,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:20:05,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:20:05,950 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:20:06,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:06,233 INFO L93 Difference]: Finished difference Result 78 states and 99 transitions. [2021-05-06 08:20:06,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:20:06,234 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 67 [2021-05-06 08:20:06,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:06,235 INFO L225 Difference]: With dead ends: 78 [2021-05-06 08:20:06,235 INFO L226 Difference]: Without dead ends: 78 [2021-05-06 08:20:06,236 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 162.6ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:20:06,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-06 08:20:06,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 71. [2021-05-06 08:20:06,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 41 states have internal predecessors, (44), 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) [2021-05-06 08:20:06,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2021-05-06 08:20:06,250 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 67 [2021-05-06 08:20:06,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:06,250 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2021-05-06 08:20:06,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:20:06,252 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2021-05-06 08:20:06,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-06 08:20:06,254 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:06,254 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:06,473 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:06,473 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:06,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:06,474 INFO L82 PathProgramCache]: Analyzing trace with hash 2004479621, now seen corresponding path program 1 times [2021-05-06 08:20:06,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:06,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200880961] [2021-05-06 08:20:06,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:06,486 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:06,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1458920356] [2021-05-06 08:20:06,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:06,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:06,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:20:06,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:06,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:06,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:06,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:06,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:06,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:06,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:06,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:06,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:06,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:06,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:06,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:06,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:06,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:06,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:06,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:06,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:06,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:06,789 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-05-06 08:20:06,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:06,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200880961] [2021-05-06 08:20:06,790 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:06,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458920356] [2021-05-06 08:20:06,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458920356] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:06,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:06,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:20:06,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912583630] [2021-05-06 08:20:06,790 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:20:06,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:06,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:20:06,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:20:06,791 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:20:06,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:06,999 INFO L93 Difference]: Finished difference Result 104 states and 143 transitions. [2021-05-06 08:20:06,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:20:06,999 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2021-05-06 08:20:07,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:07,003 INFO L225 Difference]: With dead ends: 104 [2021-05-06 08:20:07,003 INFO L226 Difference]: Without dead ends: 104 [2021-05-06 08:20:07,003 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 67.7ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:20:07,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-06 08:20:07,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 95. [2021-05-06 08:20:07,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 53 states have internal predecessors, (60), 35 states have call successors, (35), 9 states have call predecessors, (35), 8 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2021-05-06 08:20:07,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 128 transitions. [2021-05-06 08:20:07,019 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 128 transitions. Word has length 69 [2021-05-06 08:20:07,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:07,019 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 128 transitions. [2021-05-06 08:20:07,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:20:07,020 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 128 transitions. [2021-05-06 08:20:07,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-06 08:20:07,024 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:07,024 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:07,237 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:07,237 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:07,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:07,238 INFO L82 PathProgramCache]: Analyzing trace with hash 2044653414, now seen corresponding path program 1 times [2021-05-06 08:20:07,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:07,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526459942] [2021-05-06 08:20:07,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:07,260 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:07,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1645710215] [2021-05-06 08:20:07,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:07,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:07,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 08:20:07,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:07,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:07,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:07,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:07,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:07,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:07,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:07,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:07,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:07,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:07,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:07,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:07,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:07,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:07,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:07,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:07,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:07,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:07,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:07,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:07,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:07,672 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-05-06 08:20:07,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:07,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526459942] [2021-05-06 08:20:07,672 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:07,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645710215] [2021-05-06 08:20:07,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645710215] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:07,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:07,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:20:07,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113777388] [2021-05-06 08:20:07,673 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:20:07,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:07,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:20:07,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:20:07,674 INFO L87 Difference]: Start difference. First operand 95 states and 128 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:20:08,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:08,058 INFO L93 Difference]: Finished difference Result 109 states and 147 transitions. [2021-05-06 08:20:08,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:20:08,059 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 70 [2021-05-06 08:20:08,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:08,068 INFO L225 Difference]: With dead ends: 109 [2021-05-06 08:20:08,069 INFO L226 Difference]: Without dead ends: 109 [2021-05-06 08:20:08,069 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 154.9ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:20:08,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-06 08:20:08,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 99. [2021-05-06 08:20:08,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 54 states have (on average 1.1666666666666667) internal successors, (63), 56 states have internal predecessors, (63), 35 states have call successors, (35), 10 states have call predecessors, (35), 9 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2021-05-06 08:20:08,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 131 transitions. [2021-05-06 08:20:08,073 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 131 transitions. Word has length 70 [2021-05-06 08:20:08,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:08,074 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 131 transitions. [2021-05-06 08:20:08,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:20:08,074 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 131 transitions. [2021-05-06 08:20:08,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-06 08:20:08,074 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:08,075 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:08,275 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 08:20:08,275 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:08,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:08,276 INFO L82 PathProgramCache]: Analyzing trace with hash -966489810, now seen corresponding path program 2 times [2021-05-06 08:20:08,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:08,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650026631] [2021-05-06 08:20:08,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:08,311 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:08,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [659646866] [2021-05-06 08:20:08,312 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:08,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:20:08,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:20:08,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 08:20:08,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:08,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:08,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:08,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:08,554 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-05-06 08:20:08,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:08,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650026631] [2021-05-06 08:20:08,554 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:08,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659646866] [2021-05-06 08:20:08,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659646866] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:08,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:08,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:20:08,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667250411] [2021-05-06 08:20:08,555 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:20:08,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:08,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:20:08,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:20:08,556 INFO L87 Difference]: Start difference. First operand 99 states and 131 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-06 08:20:08,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:08,765 INFO L93 Difference]: Finished difference Result 107 states and 141 transitions. [2021-05-06 08:20:08,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:20:08,766 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 75 [2021-05-06 08:20:08,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:08,766 INFO L225 Difference]: With dead ends: 107 [2021-05-06 08:20:08,766 INFO L226 Difference]: Without dead ends: 106 [2021-05-06 08:20:08,767 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 43.8ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:20:08,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-06 08:20:08,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-05-06 08:20:08,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 61 states have internal predecessors, (67), 37 states have call successors, (37), 11 states have call predecessors, (37), 10 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-06 08:20:08,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 139 transitions. [2021-05-06 08:20:08,771 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 139 transitions. Word has length 75 [2021-05-06 08:20:08,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:08,772 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 139 transitions. [2021-05-06 08:20:08,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-06 08:20:08,772 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 139 transitions. [2021-05-06 08:20:08,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-06 08:20:08,772 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:08,772 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:08,990 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:08,990 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:08,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:08,991 INFO L82 PathProgramCache]: Analyzing trace with hash -271689658, now seen corresponding path program 3 times [2021-05-06 08:20:08,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:08,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752487185] [2021-05-06 08:20:08,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:08,998 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:08,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1012862447] [2021-05-06 08:20:08,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:09,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:20:09,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:20:09,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-06 08:20:09,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:09,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:09,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:09,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:09,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:09,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:09,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:09,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:09,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:09,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:09,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:09,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:09,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:09,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:09,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:09,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:09,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:09,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:09,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:09,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:09,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:09,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:09,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:09,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:09,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:09,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:09,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:09,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:09,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:09,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:09,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:09,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:09,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:09,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:09,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:09,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:09,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:09,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:09,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:09,408 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-05-06 08:20:09,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:09,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752487185] [2021-05-06 08:20:09,408 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:09,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012862447] [2021-05-06 08:20:09,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012862447] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:09,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:09,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:20:09,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681759544] [2021-05-06 08:20:09,409 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:20:09,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:09,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:20:09,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:20:09,411 INFO L87 Difference]: Start difference. First operand 106 states and 139 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 08:20:09,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:09,649 INFO L93 Difference]: Finished difference Result 132 states and 173 transitions. [2021-05-06 08:20:09,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:20:09,650 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 80 [2021-05-06 08:20:09,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:09,651 INFO L225 Difference]: With dead ends: 132 [2021-05-06 08:20:09,651 INFO L226 Difference]: Without dead ends: 132 [2021-05-06 08:20:09,651 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 186.2ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:20:09,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-05-06 08:20:09,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 129. [2021-05-06 08:20:09,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 74 states have internal predecessors, (82), 45 states have call successors, (45), 13 states have call predecessors, (45), 12 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2021-05-06 08:20:09,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 170 transitions. [2021-05-06 08:20:09,656 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 170 transitions. Word has length 80 [2021-05-06 08:20:09,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:09,656 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 170 transitions. [2021-05-06 08:20:09,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 08:20:09,657 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 170 transitions. [2021-05-06 08:20:09,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-06 08:20:09,657 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:09,657 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:09,874 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:09,874 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:09,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:09,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1540307954, now seen corresponding path program 4 times [2021-05-06 08:20:09,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:09,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488733164] [2021-05-06 08:20:09,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:09,882 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:09,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2070673889] [2021-05-06 08:20:09,882 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:09,936 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:20:09,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:20:09,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-06 08:20:09,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:10,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,221 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 25 proven. 32 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-05-06 08:20:10,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:10,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488733164] [2021-05-06 08:20:10,222 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:10,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070673889] [2021-05-06 08:20:10,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070673889] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:10,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:10,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:20:10,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271796727] [2021-05-06 08:20:10,222 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:20:10,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:10,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:20:10,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:20:10,223 INFO L87 Difference]: Start difference. First operand 129 states and 170 transitions. Second operand has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 08:20:10,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:10,430 INFO L93 Difference]: Finished difference Result 136 states and 176 transitions. [2021-05-06 08:20:10,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:20:10,430 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 85 [2021-05-06 08:20:10,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:10,431 INFO L225 Difference]: With dead ends: 136 [2021-05-06 08:20:10,431 INFO L226 Difference]: Without dead ends: 136 [2021-05-06 08:20:10,432 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 154.9ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:20:10,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-05-06 08:20:10,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 133. [2021-05-06 08:20:10,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 74 states have (on average 1.1486486486486487) internal successors, (85), 77 states have internal predecessors, (85), 45 states have call successors, (45), 14 states have call predecessors, (45), 13 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2021-05-06 08:20:10,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 173 transitions. [2021-05-06 08:20:10,437 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 173 transitions. Word has length 85 [2021-05-06 08:20:10,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:10,437 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 173 transitions. [2021-05-06 08:20:10,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 08:20:10,437 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 173 transitions. [2021-05-06 08:20:10,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-06 08:20:10,438 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:10,438 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:10,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 08:20:10,653 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:10,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:10,653 INFO L82 PathProgramCache]: Analyzing trace with hash 583225195, now seen corresponding path program 2 times [2021-05-06 08:20:10,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:10,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767162936] [2021-05-06 08:20:10,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:10,660 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:10,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2013263537] [2021-05-06 08:20:10,660 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:10,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:20:10,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:20:10,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-06 08:20:10,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:10,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:10,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:11,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:11,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:11,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:11,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:11,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:11,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:11,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:11,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:11,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:11,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:11,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:11,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:11,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:11,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:11,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:11,139 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 55 proven. 40 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-05-06 08:20:11,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:11,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767162936] [2021-05-06 08:20:11,139 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:11,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013263537] [2021-05-06 08:20:11,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013263537] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:11,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:11,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 08:20:11,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973212138] [2021-05-06 08:20:11,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 08:20:11,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:11,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 08:20:11,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:20:11,141 INFO L87 Difference]: Start difference. First operand 133 states and 173 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 08:20:11,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:11,526 INFO L93 Difference]: Finished difference Result 150 states and 198 transitions. [2021-05-06 08:20:11,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:20:11,527 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) Word has length 89 [2021-05-06 08:20:11,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:11,528 INFO L225 Difference]: With dead ends: 150 [2021-05-06 08:20:11,528 INFO L226 Difference]: Without dead ends: 150 [2021-05-06 08:20:11,528 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 230.9ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-05-06 08:20:11,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-05-06 08:20:11,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 143. [2021-05-06 08:20:11,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 79 states have (on average 1.1518987341772151) internal successors, (91), 82 states have internal predecessors, (91), 49 states have call successors, (49), 15 states have call predecessors, (49), 14 states have return successors, (47), 45 states have call predecessors, (47), 47 states have call successors, (47) [2021-05-06 08:20:11,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 187 transitions. [2021-05-06 08:20:11,533 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 187 transitions. Word has length 89 [2021-05-06 08:20:11,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:11,533 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 187 transitions. [2021-05-06 08:20:11,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 08:20:11,533 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 187 transitions. [2021-05-06 08:20:11,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-06 08:20:11,534 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:11,534 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:11,763 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 08:20:11,763 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:11,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:11,764 INFO L82 PathProgramCache]: Analyzing trace with hash -757951041, now seen corresponding path program 1 times [2021-05-06 08:20:11,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:11,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716838080] [2021-05-06 08:20:11,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:11,769 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:11,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1139911601] [2021-05-06 08:20:11,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:11,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:11,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-06 08:20:11,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:12,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:12,115 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 33 proven. 12 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-05-06 08:20:12,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:12,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716838080] [2021-05-06 08:20:12,115 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:12,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139911601] [2021-05-06 08:20:12,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139911601] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:12,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:12,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:20:12,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995061736] [2021-05-06 08:20:12,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:20:12,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:12,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:20:12,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:20:12,116 INFO L87 Difference]: Start difference. First operand 143 states and 187 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:20:12,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:12,448 INFO L93 Difference]: Finished difference Result 167 states and 218 transitions. [2021-05-06 08:20:12,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:20:12,448 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 91 [2021-05-06 08:20:12,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:12,449 INFO L225 Difference]: With dead ends: 167 [2021-05-06 08:20:12,449 INFO L226 Difference]: Without dead ends: 166 [2021-05-06 08:20:12,449 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 145.1ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:20:12,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-05-06 08:20:12,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 156. [2021-05-06 08:20:12,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 87 states have (on average 1.1494252873563218) internal successors, (100), 90 states have internal predecessors, (100), 53 states have call successors, (53), 16 states have call predecessors, (53), 15 states have return successors, (51), 49 states have call predecessors, (51), 51 states have call successors, (51) [2021-05-06 08:20:12,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 204 transitions. [2021-05-06 08:20:12,454 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 204 transitions. Word has length 91 [2021-05-06 08:20:12,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:12,455 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 204 transitions. [2021-05-06 08:20:12,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:20:12,455 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 204 transitions. [2021-05-06 08:20:12,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-06 08:20:12,455 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:12,455 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:12,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-06 08:20:12,669 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:12,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:12,669 INFO L82 PathProgramCache]: Analyzing trace with hash -761940128, now seen corresponding path program 1 times [2021-05-06 08:20:12,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:12,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145985136] [2021-05-06 08:20:12,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:12,675 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:12,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1140979639] [2021-05-06 08:20:12,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:12,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:12,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:20:12,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:12,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:12,872 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-05-06 08:20:12,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:12,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145985136] [2021-05-06 08:20:12,873 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:12,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140979639] [2021-05-06 08:20:12,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140979639] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:12,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:12,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:20:12,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076379096] [2021-05-06 08:20:12,874 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:20:12,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:12,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:20:12,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:20:12,874 INFO L87 Difference]: Start difference. First operand 156 states and 204 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-05-06 08:20:12,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:12,922 INFO L93 Difference]: Finished difference Result 195 states and 269 transitions. [2021-05-06 08:20:12,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:20:12,923 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 92 [2021-05-06 08:20:12,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:12,924 INFO L225 Difference]: With dead ends: 195 [2021-05-06 08:20:12,924 INFO L226 Difference]: Without dead ends: 195 [2021-05-06 08:20:12,924 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.7ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:20:12,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-05-06 08:20:12,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 176. [2021-05-06 08:20:12,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 97 states have (on average 1.1546391752577319) internal successors, (112), 103 states have internal predecessors, (112), 62 states have call successors, (62), 17 states have call predecessors, (62), 16 states have return successors, (60), 55 states have call predecessors, (60), 60 states have call successors, (60) [2021-05-06 08:20:12,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 234 transitions. [2021-05-06 08:20:12,929 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 234 transitions. Word has length 92 [2021-05-06 08:20:12,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:12,930 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 234 transitions. [2021-05-06 08:20:12,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-05-06 08:20:12,930 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 234 transitions. [2021-05-06 08:20:12,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-06 08:20:12,931 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:12,931 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:13,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:13,145 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:13,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:13,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1452951817, now seen corresponding path program 5 times [2021-05-06 08:20:13,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:13,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346314549] [2021-05-06 08:20:13,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:13,151 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:13,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2135181465] [2021-05-06 08:20:13,151 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:13,213 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-06 08:20:13,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:20:13,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:20:13,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:13,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:13,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:13,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:13,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:13,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:13,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:13,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:13,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:13,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:13,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:13,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:13,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:13,330 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-05-06 08:20:13,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:13,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346314549] [2021-05-06 08:20:13,330 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:13,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135181465] [2021-05-06 08:20:13,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135181465] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:20:13,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:20:13,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:20:13,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189050876] [2021-05-06 08:20:13,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:20:13,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:13,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:20:13,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:20:13,331 INFO L87 Difference]: Start difference. First operand 176 states and 234 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-05-06 08:20:13,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:13,387 INFO L93 Difference]: Finished difference Result 160 states and 203 transitions. [2021-05-06 08:20:13,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:20:13,388 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 105 [2021-05-06 08:20:13,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:13,389 INFO L225 Difference]: With dead ends: 160 [2021-05-06 08:20:13,389 INFO L226 Difference]: Without dead ends: 160 [2021-05-06 08:20:13,389 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 18.8ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:20:13,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-05-06 08:20:13,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 150. [2021-05-06 08:20:13,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 84 states have (on average 1.0952380952380953) internal successors, (92), 89 states have internal predecessors, (92), 49 states have call successors, (49), 17 states have call predecessors, (49), 16 states have return successors, (47), 43 states have call predecessors, (47), 47 states have call successors, (47) [2021-05-06 08:20:13,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 188 transitions. [2021-05-06 08:20:13,393 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 188 transitions. Word has length 105 [2021-05-06 08:20:13,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:13,393 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 188 transitions. [2021-05-06 08:20:13,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-05-06 08:20:13,393 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 188 transitions. [2021-05-06 08:20:13,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-06 08:20:13,394 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:13,394 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:13,608 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 08:20:13,609 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:13,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:13,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1708635976, now seen corresponding path program 2 times [2021-05-06 08:20:13,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:13,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224950223] [2021-05-06 08:20:13,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:13,615 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:13,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [769942849] [2021-05-06 08:20:13,615 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:13,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:20:13,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:20:13,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 67 conjunts are in the unsatisfiable core [2021-05-06 08:20:13,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:13,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:13,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:13,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:13,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:13,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:13,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:13,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:13,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:13,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:13,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:13,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:13,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:14,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:14,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:14,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:14,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:14,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:14,054 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 87 proven. 37 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-05-06 08:20:14,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:14,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224950223] [2021-05-06 08:20:14,054 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:14,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769942849] [2021-05-06 08:20:14,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769942849] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:14,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:14,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:20:14,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480999812] [2021-05-06 08:20:14,055 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:20:14,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:14,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:20:14,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:20:14,056 INFO L87 Difference]: Start difference. First operand 150 states and 188 transitions. Second operand has 13 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-06 08:20:14,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:14,441 INFO L93 Difference]: Finished difference Result 160 states and 196 transitions. [2021-05-06 08:20:14,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:20:14,441 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) Word has length 107 [2021-05-06 08:20:14,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:14,443 INFO L225 Difference]: With dead ends: 160 [2021-05-06 08:20:14,443 INFO L226 Difference]: Without dead ends: 160 [2021-05-06 08:20:14,443 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 197.2ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:20:14,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-05-06 08:20:14,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 158. [2021-05-06 08:20:14,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 90 states have (on average 1.0888888888888888) internal successors, (98), 95 states have internal predecessors, (98), 49 states have call successors, (49), 19 states have call predecessors, (49), 18 states have return successors, (47), 43 states have call predecessors, (47), 47 states have call successors, (47) [2021-05-06 08:20:14,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 194 transitions. [2021-05-06 08:20:14,449 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 194 transitions. Word has length 107 [2021-05-06 08:20:14,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:14,450 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 194 transitions. [2021-05-06 08:20:14,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-06 08:20:14,450 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 194 transitions. [2021-05-06 08:20:14,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-05-06 08:20:14,451 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:14,451 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 4, 4, 3, 3, 3, 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] [2021-05-06 08:20:14,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 08:20:14,669 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:14,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:14,669 INFO L82 PathProgramCache]: Analyzing trace with hash 82449829, now seen corresponding path program 3 times [2021-05-06 08:20:14,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:14,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481154974] [2021-05-06 08:20:14,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:14,675 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:14,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1080551012] [2021-05-06 08:20:14,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:14,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:20:14,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:20:14,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-06 08:20:14,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:14,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:14,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:14,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:14,941 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 61 proven. 10 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-05-06 08:20:14,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:14,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481154974] [2021-05-06 08:20:14,941 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:14,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080551012] [2021-05-06 08:20:14,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080551012] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:14,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:14,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:20:14,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043056851] [2021-05-06 08:20:14,942 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:20:14,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:14,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:20:14,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:20:14,943 INFO L87 Difference]: Start difference. First operand 158 states and 194 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-05-06 08:20:14,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:14,991 INFO L93 Difference]: Finished difference Result 162 states and 197 transitions. [2021-05-06 08:20:14,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:20:14,992 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 111 [2021-05-06 08:20:14,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:14,993 INFO L225 Difference]: With dead ends: 162 [2021-05-06 08:20:14,993 INFO L226 Difference]: Without dead ends: 162 [2021-05-06 08:20:14,993 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 25.1ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:20:14,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-05-06 08:20:14,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2021-05-06 08:20:14,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 93 states have (on average 1.086021505376344) internal successors, (101), 98 states have internal predecessors, (101), 49 states have call successors, (49), 20 states have call predecessors, (49), 19 states have return successors, (47), 43 states have call predecessors, (47), 47 states have call successors, (47) [2021-05-06 08:20:14,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 197 transitions. [2021-05-06 08:20:14,998 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 197 transitions. Word has length 111 [2021-05-06 08:20:14,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:14,999 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 197 transitions. [2021-05-06 08:20:14,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-05-06 08:20:14,999 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 197 transitions. [2021-05-06 08:20:15,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-05-06 08:20:15,000 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:15,000 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:15,201 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:15,201 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:15,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:15,202 INFO L82 PathProgramCache]: Analyzing trace with hash -966740615, now seen corresponding path program 2 times [2021-05-06 08:20:15,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:15,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525583636] [2021-05-06 08:20:15,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:15,207 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:15,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1645795211] [2021-05-06 08:20:15,207 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:15,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:20:15,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:20:15,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-06 08:20:15,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:15,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:15,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:15,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:15,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:15,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:15,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:15,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:15,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:15,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:15,644 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 47 proven. 30 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2021-05-06 08:20:15,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:15,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525583636] [2021-05-06 08:20:15,645 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:15,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645795211] [2021-05-06 08:20:15,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645795211] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:15,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:15,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:20:15,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984564577] [2021-05-06 08:20:15,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:20:15,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:15,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:20:15,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:20:15,647 INFO L87 Difference]: Start difference. First operand 162 states and 197 transitions. Second operand has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 6 states have call successors, (19) [2021-05-06 08:20:16,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:16,167 INFO L93 Difference]: Finished difference Result 194 states and 242 transitions. [2021-05-06 08:20:16,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:20:16,167 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 6 states have call successors, (19) Word has length 113 [2021-05-06 08:20:16,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:16,168 INFO L225 Difference]: With dead ends: 194 [2021-05-06 08:20:16,168 INFO L226 Difference]: Without dead ends: 193 [2021-05-06 08:20:16,169 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 188.0ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:20:16,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-05-06 08:20:16,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 191. [2021-05-06 08:20:16,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 108 states have (on average 1.0925925925925926) internal successors, (118), 113 states have internal predecessors, (118), 61 states have call successors, (61), 22 states have call predecessors, (61), 21 states have return successors, (59), 55 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-06 08:20:16,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 238 transitions. [2021-05-06 08:20:16,173 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 238 transitions. Word has length 113 [2021-05-06 08:20:16,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:16,173 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 238 transitions. [2021-05-06 08:20:16,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 6 states have call successors, (19) [2021-05-06 08:20:16,173 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 238 transitions. [2021-05-06 08:20:16,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-06 08:20:16,174 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:16,174 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:16,386 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:16,386 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:16,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:16,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1855467922, now seen corresponding path program 3 times [2021-05-06 08:20:16,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:16,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912197137] [2021-05-06 08:20:16,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:16,395 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:16,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1553798852] [2021-05-06 08:20:16,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:16,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:20:16,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:20:16,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:20:16,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:16,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:16,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:16,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:16,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:16,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:16,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:16,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:16,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:16,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:16,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:16,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:16,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:16,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:16,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:16,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:16,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:16,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:16,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:16,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:16,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:16,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:16,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:16,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:16,754 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-05-06 08:20:16,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:16,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912197137] [2021-05-06 08:20:16,755 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:16,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553798852] [2021-05-06 08:20:16,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553798852] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:16,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:16,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:20:16,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007776636] [2021-05-06 08:20:16,756 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:20:16,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:16,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:20:16,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:20:16,756 INFO L87 Difference]: Start difference. First operand 191 states and 238 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-05-06 08:20:16,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:16,973 INFO L93 Difference]: Finished difference Result 230 states and 307 transitions. [2021-05-06 08:20:16,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:20:16,973 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 116 [2021-05-06 08:20:16,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:16,981 INFO L225 Difference]: With dead ends: 230 [2021-05-06 08:20:16,981 INFO L226 Difference]: Without dead ends: 230 [2021-05-06 08:20:16,981 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 95.8ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:20:16,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-05-06 08:20:17,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 210. [2021-05-06 08:20:17,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 115 states have (on average 1.1217391304347826) internal successors, (129), 116 states have internal predecessors, (129), 73 states have call successors, (73), 22 states have call predecessors, (73), 21 states have return successors, (71), 71 states have call predecessors, (71), 71 states have call successors, (71) [2021-05-06 08:20:17,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 273 transitions. [2021-05-06 08:20:17,007 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 273 transitions. Word has length 116 [2021-05-06 08:20:17,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:17,007 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 273 transitions. [2021-05-06 08:20:17,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-05-06 08:20:17,007 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 273 transitions. [2021-05-06 08:20:17,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-05-06 08:20:17,008 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:17,008 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 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, 1] [2021-05-06 08:20:17,225 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:17,225 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:17,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:17,226 INFO L82 PathProgramCache]: Analyzing trace with hash 259955901, now seen corresponding path program 3 times [2021-05-06 08:20:17,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:17,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510304358] [2021-05-06 08:20:17,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:17,231 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:17,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1377262010] [2021-05-06 08:20:17,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:17,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:20:17,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:20:17,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 66 conjunts are in the unsatisfiable core [2021-05-06 08:20:17,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:17,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:17,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:17,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:17,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:17,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:17,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:17,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:17,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:17,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:17,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:17,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:17,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:17,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:17,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:17,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:17,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:17,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:17,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:17,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:17,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:17,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:17,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:17,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:17,935 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 66 proven. 38 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2021-05-06 08:20:17,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:17,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510304358] [2021-05-06 08:20:17,935 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:17,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377262010] [2021-05-06 08:20:17,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377262010] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:17,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:17,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 08:20:17,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934822630] [2021-05-06 08:20:17,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 08:20:17,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:17,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 08:20:17,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:20:17,937 INFO L87 Difference]: Start difference. First operand 210 states and 273 transitions. Second operand has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-06 08:20:18,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:18,460 INFO L93 Difference]: Finished difference Result 247 states and 321 transitions. [2021-05-06 08:20:18,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:20:18,460 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) Word has length 127 [2021-05-06 08:20:18,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:18,461 INFO L225 Difference]: With dead ends: 247 [2021-05-06 08:20:18,462 INFO L226 Difference]: Without dead ends: 247 [2021-05-06 08:20:18,462 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 440.0ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-05-06 08:20:18,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-05-06 08:20:18,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 243. [2021-05-06 08:20:18,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 133 states have (on average 1.1203007518796992) internal successors, (149), 134 states have internal predecessors, (149), 85 states have call successors, (85), 25 states have call predecessors, (85), 24 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2021-05-06 08:20:18,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 317 transitions. [2021-05-06 08:20:18,469 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 317 transitions. Word has length 127 [2021-05-06 08:20:18,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:18,469 INFO L480 AbstractCegarLoop]: Abstraction has 243 states and 317 transitions. [2021-05-06 08:20:18,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-06 08:20:18,470 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 317 transitions. [2021-05-06 08:20:18,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-05-06 08:20:18,471 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:18,471 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:18,687 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-06 08:20:18,688 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:18,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:18,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1431100670, now seen corresponding path program 4 times [2021-05-06 08:20:18,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:18,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291765625] [2021-05-06 08:20:18,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:18,695 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:18,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [676052363] [2021-05-06 08:20:18,696 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:18,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:20:18,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:20:18,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 67 conjunts are in the unsatisfiable core [2021-05-06 08:20:18,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:18,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:18,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:18,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:18,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:18,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:18,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:18,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:18,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:18,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:18,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:18,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:18,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:18,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:18,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:18,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:18,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:19,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:19,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:19,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:19,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:19,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:19,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:19,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:19,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:19,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:19,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:19,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:19,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:19,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:19,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:19,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:19,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:19,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:19,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:19,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:19,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:19,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:19,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:19,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:19,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:19,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:19,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:19,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:19,618 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 102 proven. 95 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2021-05-06 08:20:19,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:19,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291765625] [2021-05-06 08:20:19,619 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:19,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676052363] [2021-05-06 08:20:19,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676052363] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:19,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:19,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 08:20:19,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336633235] [2021-05-06 08:20:19,619 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 08:20:19,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:19,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 08:20:19,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:20:19,620 INFO L87 Difference]: Start difference. First operand 243 states and 317 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 15 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2021-05-06 08:20:20,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:20,880 INFO L93 Difference]: Finished difference Result 250 states and 323 transitions. [2021-05-06 08:20:20,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 08:20:20,882 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 15 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 129 [2021-05-06 08:20:20,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:20,883 INFO L225 Difference]: With dead ends: 250 [2021-05-06 08:20:20,883 INFO L226 Difference]: Without dead ends: 250 [2021-05-06 08:20:20,883 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 110 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 693.3ms TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-05-06 08:20:20,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-05-06 08:20:20,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 247. [2021-05-06 08:20:20,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 136 states have (on average 1.1176470588235294) internal successors, (152), 137 states have internal predecessors, (152), 85 states have call successors, (85), 26 states have call predecessors, (85), 25 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2021-05-06 08:20:20,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 320 transitions. [2021-05-06 08:20:20,889 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 320 transitions. Word has length 129 [2021-05-06 08:20:20,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:20,889 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 320 transitions. [2021-05-06 08:20:20,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 15 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2021-05-06 08:20:20,889 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 320 transitions. [2021-05-06 08:20:20,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-05-06 08:20:20,890 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:20,890 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1] [2021-05-06 08:20:21,110 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-06 08:20:21,110 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:21,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:21,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1491357193, now seen corresponding path program 5 times [2021-05-06 08:20:21,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:21,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304457064] [2021-05-06 08:20:21,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:21,116 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:21,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [256950012] [2021-05-06 08:20:21,117 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:21,301 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 08:20:21,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:20:21,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-06 08:20:21,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:21,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:21,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:21,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:21,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:21,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:21,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:21,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:21,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:21,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:21,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:21,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:21,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:21,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:21,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:21,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:21,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:21,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:21,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:21,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:21,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:21,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:21,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:21,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:21,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:21,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:21,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:21,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:21,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:21,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:21,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:21,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:21,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:22,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:22,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:22,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:22,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:22,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:22,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:22,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:22,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:22,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:22,210 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 74 proven. 53 refuted. 0 times theorem prover too weak. 423 trivial. 0 not checked. [2021-05-06 08:20:22,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:22,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304457064] [2021-05-06 08:20:22,210 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:22,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256950012] [2021-05-06 08:20:22,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256950012] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:22,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:22,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 08:20:22,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267632819] [2021-05-06 08:20:22,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 08:20:22,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:22,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 08:20:22,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:20:22,211 INFO L87 Difference]: Start difference. First operand 247 states and 320 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 7 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2021-05-06 08:20:22,473 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-05-06 08:20:23,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:23,707 INFO L93 Difference]: Finished difference Result 261 states and 332 transitions. [2021-05-06 08:20:23,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 08:20:23,708 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 7 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) Word has length 132 [2021-05-06 08:20:23,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:23,709 INFO L225 Difference]: With dead ends: 261 [2021-05-06 08:20:23,709 INFO L226 Difference]: Without dead ends: 261 [2021-05-06 08:20:23,710 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 937.7ms TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-05-06 08:20:23,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-05-06 08:20:23,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 255. [2021-05-06 08:20:23,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 142 states have (on average 1.1126760563380282) internal successors, (158), 143 states have internal predecessors, (158), 85 states have call successors, (85), 28 states have call predecessors, (85), 27 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2021-05-06 08:20:23,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 326 transitions. [2021-05-06 08:20:23,715 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 326 transitions. Word has length 132 [2021-05-06 08:20:23,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:23,715 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 326 transitions. [2021-05-06 08:20:23,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 7 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2021-05-06 08:20:23,715 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 326 transitions. [2021-05-06 08:20:23,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-05-06 08:20:23,716 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:23,717 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 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, 1] [2021-05-06 08:20:23,934 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:23,935 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:23,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:23,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1694952883, now seen corresponding path program 4 times [2021-05-06 08:20:23,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:23,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595696258] [2021-05-06 08:20:23,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:23,940 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:23,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2117588827] [2021-05-06 08:20:23,941 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:24,041 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:20:24,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:20:24,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 68 conjunts are in the unsatisfiable core [2021-05-06 08:20:24,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:24,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:24,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:24,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:24,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:24,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:24,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:24,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:24,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:24,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:24,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:24,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:24,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:24,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:24,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:24,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:24,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:24,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:24,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:24,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:24,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:24,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:24,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:24,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:24,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:24,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:24,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:24,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:24,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:24,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:24,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:24,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:24,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:24,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:24,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:24,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:24,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:24,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:24,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:24,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:24,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:24,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:24,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:24,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:24,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:24,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:24,919 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 121 proven. 108 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2021-05-06 08:20:24,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:24,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595696258] [2021-05-06 08:20:24,920 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:24,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117588827] [2021-05-06 08:20:24,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117588827] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:24,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:24,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-06 08:20:24,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505179919] [2021-05-06 08:20:24,921 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 08:20:24,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:24,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 08:20:24,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:20:24,921 INFO L87 Difference]: Start difference. First operand 255 states and 326 transitions. Second operand has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) [2021-05-06 08:20:25,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:25,610 INFO L93 Difference]: Finished difference Result 274 states and 348 transitions. [2021-05-06 08:20:25,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 08:20:25,611 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) Word has length 135 [2021-05-06 08:20:25,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:25,612 INFO L225 Difference]: With dead ends: 274 [2021-05-06 08:20:25,612 INFO L226 Difference]: Without dead ends: 266 [2021-05-06 08:20:25,612 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 115 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 469.7ms TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-05-06 08:20:25,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-05-06 08:20:25,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 265. [2021-05-06 08:20:25,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 147 states have (on average 1.1088435374149659) internal successors, (163), 148 states have internal predecessors, (163), 89 states have call successors, (89), 29 states have call predecessors, (89), 28 states have return successors, (87), 87 states have call predecessors, (87), 87 states have call successors, (87) [2021-05-06 08:20:25,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 339 transitions. [2021-05-06 08:20:25,618 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 339 transitions. Word has length 135 [2021-05-06 08:20:25,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:25,618 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 339 transitions. [2021-05-06 08:20:25,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) [2021-05-06 08:20:25,618 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 339 transitions. [2021-05-06 08:20:25,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-05-06 08:20:25,619 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:25,619 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:25,819 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-06 08:20:25,820 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:25,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:25,820 INFO L82 PathProgramCache]: Analyzing trace with hash -928796440, now seen corresponding path program 5 times [2021-05-06 08:20:25,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:25,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872955828] [2021-05-06 08:20:25,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:25,826 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:25,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [388112801] [2021-05-06 08:20:25,826 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:25,934 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-06 08:20:25,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:20:25,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-06 08:20:25,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:26,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:26,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:26,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:26,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:26,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:26,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:26,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:26,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:26,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:26,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:26,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:26,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:26,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:26,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:26,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:26,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:26,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:26,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:26,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:26,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:26,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:26,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:26,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:26,579 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 85 proven. 134 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2021-05-06 08:20:26,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:26,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872955828] [2021-05-06 08:20:26,579 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:26,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388112801] [2021-05-06 08:20:26,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388112801] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:26,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:26,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 08:20:26,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681303941] [2021-05-06 08:20:26,580 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 08:20:26,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:26,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 08:20:26,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:20:26,581 INFO L87 Difference]: Start difference. First operand 265 states and 339 transitions. Second operand has 16 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 9 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 8 states have call successors, (23) [2021-05-06 08:20:27,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:27,521 INFO L93 Difference]: Finished difference Result 309 states and 400 transitions. [2021-05-06 08:20:27,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 08:20:27,530 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 9 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 8 states have call successors, (23) Word has length 138 [2021-05-06 08:20:27,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:27,534 INFO L225 Difference]: With dead ends: 309 [2021-05-06 08:20:27,534 INFO L226 Difference]: Without dead ends: 304 [2021-05-06 08:20:27,534 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 121 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 422.2ms TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-05-06 08:20:27,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-05-06 08:20:27,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 279. [2021-05-06 08:20:27,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 155 states have (on average 1.1096774193548387) internal successors, (172), 156 states have internal predecessors, (172), 93 states have call successors, (93), 31 states have call predecessors, (93), 30 states have return successors, (91), 91 states have call predecessors, (91), 91 states have call successors, (91) [2021-05-06 08:20:27,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 356 transitions. [2021-05-06 08:20:27,541 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 356 transitions. Word has length 138 [2021-05-06 08:20:27,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:27,541 INFO L480 AbstractCegarLoop]: Abstraction has 279 states and 356 transitions. [2021-05-06 08:20:27,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 9 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 8 states have call successors, (23) [2021-05-06 08:20:27,541 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 356 transitions. [2021-05-06 08:20:27,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-05-06 08:20:27,542 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:27,542 INFO L523 BasicCegarLoop]: trace histogram [19, 18, 18, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:27,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:27,743 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:27,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:27,743 INFO L82 PathProgramCache]: Analyzing trace with hash 336218627, now seen corresponding path program 6 times [2021-05-06 08:20:27,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:27,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663691805] [2021-05-06 08:20:27,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:27,749 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:27,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1116944552] [2021-05-06 08:20:27,749 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:27,915 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-06 08:20:27,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:20:27,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 71 conjunts are in the unsatisfiable core [2021-05-06 08:20:27,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:27,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:27,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:27,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:27,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:28,852 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 89 proven. 72 refuted. 0 times theorem prover too weak. 606 trivial. 0 not checked. [2021-05-06 08:20:28,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:28,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663691805] [2021-05-06 08:20:28,852 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:28,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116944552] [2021-05-06 08:20:28,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116944552] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:28,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:28,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-06 08:20:28,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254450632] [2021-05-06 08:20:28,854 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-06 08:20:28,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:28,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-06 08:20:28,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:20:28,855 INFO L87 Difference]: Start difference. First operand 279 states and 356 transitions. Second operand has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 9 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 9 states have call predecessors, (25), 8 states have call successors, (25) [2021-05-06 08:20:32,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:32,892 INFO L93 Difference]: Finished difference Result 316 states and 404 transitions. [2021-05-06 08:20:32,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 08:20:32,893 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 9 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 9 states have call predecessors, (25), 8 states have call successors, (25) Word has length 149 [2021-05-06 08:20:32,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:32,894 INFO L225 Difference]: With dead ends: 316 [2021-05-06 08:20:32,894 INFO L226 Difference]: Without dead ends: 316 [2021-05-06 08:20:32,894 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 711.5ms TimeCoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2021-05-06 08:20:32,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-05-06 08:20:32,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 312. [2021-05-06 08:20:32,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 173 states have (on average 1.1098265895953756) internal successors, (192), 174 states have internal predecessors, (192), 105 states have call successors, (105), 34 states have call predecessors, (105), 33 states have return successors, (103), 103 states have call predecessors, (103), 103 states have call successors, (103) [2021-05-06 08:20:32,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 400 transitions. [2021-05-06 08:20:32,901 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 400 transitions. Word has length 149 [2021-05-06 08:20:32,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:32,901 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 400 transitions. [2021-05-06 08:20:32,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 9 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 9 states have call predecessors, (25), 8 states have call successors, (25) [2021-05-06 08:20:32,901 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 400 transitions. [2021-05-06 08:20:32,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-05-06 08:20:32,902 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:32,902 INFO L523 BasicCegarLoop]: trace histogram [19, 18, 18, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:33,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-06 08:20:33,121 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:33,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:33,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1855514487, now seen corresponding path program 7 times [2021-05-06 08:20:33,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:33,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958534328] [2021-05-06 08:20:33,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:33,129 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:33,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [978274030] [2021-05-06 08:20:33,129 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:33,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:33,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 72 conjunts are in the unsatisfiable core [2021-05-06 08:20:33,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:33,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:33,728 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 109 proven. 97 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2021-05-06 08:20:33,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:33,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958534328] [2021-05-06 08:20:33,728 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:33,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978274030] [2021-05-06 08:20:33,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978274030] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:33,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:33,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-06 08:20:33,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775415534] [2021-05-06 08:20:33,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-06 08:20:33,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:33,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-06 08:20:33,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-06 08:20:33,730 INFO L87 Difference]: Start difference. First operand 312 states and 400 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 9 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 8 states have call predecessors, (25), 9 states have call successors, (25) [2021-05-06 08:20:34,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:34,423 INFO L93 Difference]: Finished difference Result 349 states and 448 transitions. [2021-05-06 08:20:34,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 08:20:34,425 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 9 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 8 states have call predecessors, (25), 9 states have call successors, (25) Word has length 149 [2021-05-06 08:20:34,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:34,426 INFO L225 Difference]: With dead ends: 349 [2021-05-06 08:20:34,427 INFO L226 Difference]: Without dead ends: 349 [2021-05-06 08:20:34,427 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 394.4ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-05-06 08:20:34,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-05-06 08:20:34,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 345. [2021-05-06 08:20:34,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 191 states have (on average 1.1099476439790577) internal successors, (212), 192 states have internal predecessors, (212), 117 states have call successors, (117), 37 states have call predecessors, (117), 36 states have return successors, (115), 115 states have call predecessors, (115), 115 states have call successors, (115) [2021-05-06 08:20:34,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 444 transitions. [2021-05-06 08:20:34,433 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 444 transitions. Word has length 149 [2021-05-06 08:20:34,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:34,434 INFO L480 AbstractCegarLoop]: Abstraction has 345 states and 444 transitions. [2021-05-06 08:20:34,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 9 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 8 states have call predecessors, (25), 9 states have call successors, (25) [2021-05-06 08:20:34,434 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 444 transitions. [2021-05-06 08:20:34,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-05-06 08:20:34,435 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:34,435 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:34,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:34,652 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:34,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:34,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1866948721, now seen corresponding path program 8 times [2021-05-06 08:20:34,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:34,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581144320] [2021-05-06 08:20:34,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:34,658 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:34,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [901503688] [2021-05-06 08:20:34,658 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:34,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:20:34,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:20:34,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 71 conjunts are in the unsatisfiable core [2021-05-06 08:20:34,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:34,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:34,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:34,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:34,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:34,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:34,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:34,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:34,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:34,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:34,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:34,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:34,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:34,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:34,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,157 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2021-05-06 08:20:35,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:35,817 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 99 proven. 128 refuted. 0 times theorem prover too weak. 618 trivial. 0 not checked. [2021-05-06 08:20:35,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:35,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581144320] [2021-05-06 08:20:35,817 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:35,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901503688] [2021-05-06 08:20:35,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901503688] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:35,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:35,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-05-06 08:20:35,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251559697] [2021-05-06 08:20:35,818 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-06 08:20:35,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:35,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-06 08:20:35,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-05-06 08:20:35,819 INFO L87 Difference]: Start difference. First operand 345 states and 444 transitions. Second operand has 22 states, 20 states have (on average 1.85) internal successors, (37), 17 states have internal predecessors, (37), 11 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 11 states have call predecessors, (26), 10 states have call successors, (26) [2021-05-06 08:20:37,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:37,621 INFO L93 Difference]: Finished difference Result 359 states and 456 transitions. [2021-05-06 08:20:37,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-06 08:20:37,622 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.85) internal successors, (37), 17 states have internal predecessors, (37), 11 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 11 states have call predecessors, (26), 10 states have call successors, (26) Word has length 154 [2021-05-06 08:20:37,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:37,623 INFO L225 Difference]: With dead ends: 359 [2021-05-06 08:20:37,623 INFO L226 Difference]: Without dead ends: 359 [2021-05-06 08:20:37,624 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1092.2ms TimeCoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2021-05-06 08:20:37,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-05-06 08:20:37,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 353. [2021-05-06 08:20:37,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 197 states have (on average 1.1065989847715736) internal successors, (218), 198 states have internal predecessors, (218), 117 states have call successors, (117), 39 states have call predecessors, (117), 38 states have return successors, (115), 115 states have call predecessors, (115), 115 states have call successors, (115) [2021-05-06 08:20:37,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 450 transitions. [2021-05-06 08:20:37,631 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 450 transitions. Word has length 154 [2021-05-06 08:20:37,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:37,631 INFO L480 AbstractCegarLoop]: Abstraction has 353 states and 450 transitions. [2021-05-06 08:20:37,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 20 states have (on average 1.85) internal successors, (37), 17 states have internal predecessors, (37), 11 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 11 states have call predecessors, (26), 10 states have call successors, (26) [2021-05-06 08:20:37,631 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 450 transitions. [2021-05-06 08:20:37,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-05-06 08:20:37,632 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:37,632 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:37,846 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-05-06 08:20:37,846 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:37,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:37,847 INFO L82 PathProgramCache]: Analyzing trace with hash 742722429, now seen corresponding path program 9 times [2021-05-06 08:20:37,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:37,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101380456] [2021-05-06 08:20:37,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:37,851 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:37,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1350321755] [2021-05-06 08:20:37,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:37,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:20:37,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:20:37,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 61 conjunts are in the unsatisfiable core [2021-05-06 08:20:37,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:38,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:38,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:38,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:38,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:38,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:38,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:38,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:38,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:38,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:38,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:38,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:38,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:38,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:38,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:38,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:38,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:38,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:38,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:38,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:38,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:38,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:38,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:38,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:38,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:38,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:38,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:38,669 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 132 proven. 65 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2021-05-06 08:20:38,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:38,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101380456] [2021-05-06 08:20:38,670 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:38,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350321755] [2021-05-06 08:20:38,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350321755] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:38,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:38,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 08:20:38,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987801102] [2021-05-06 08:20:38,670 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 08:20:38,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:38,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 08:20:38,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:20:38,671 INFO L87 Difference]: Start difference. First operand 353 states and 450 transitions. Second operand has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 6 states have call successors, (22) [2021-05-06 08:20:40,336 WARN L205 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-05-06 08:20:41,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:41,120 INFO L93 Difference]: Finished difference Result 423 states and 543 transitions. [2021-05-06 08:20:41,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:20:41,121 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 6 states have call successors, (22) Word has length 154 [2021-05-06 08:20:41,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:41,122 INFO L225 Difference]: With dead ends: 423 [2021-05-06 08:20:41,122 INFO L226 Difference]: Without dead ends: 423 [2021-05-06 08:20:41,122 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1285.3ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-05-06 08:20:41,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-05-06 08:20:41,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 419. [2021-05-06 08:20:41,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 233 states have (on average 1.111587982832618) internal successors, (259), 234 states have internal predecessors, (259), 141 states have call successors, (141), 45 states have call predecessors, (141), 44 states have return successors, (139), 139 states have call predecessors, (139), 139 states have call successors, (139) [2021-05-06 08:20:41,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 539 transitions. [2021-05-06 08:20:41,132 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 539 transitions. Word has length 154 [2021-05-06 08:20:41,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:41,132 INFO L480 AbstractCegarLoop]: Abstraction has 419 states and 539 transitions. [2021-05-06 08:20:41,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 6 states have call successors, (22) [2021-05-06 08:20:41,132 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 539 transitions. [2021-05-06 08:20:41,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-05-06 08:20:41,133 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:41,133 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 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, 1] [2021-05-06 08:20:41,352 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:41,353 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:41,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:41,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1947214227, now seen corresponding path program 6 times [2021-05-06 08:20:41,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:41,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111235548] [2021-05-06 08:20:41,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:41,359 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:41,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1122646597] [2021-05-06 08:20:41,359 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:41,450 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-06 08:20:41,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:20:41,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-06 08:20:41,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:41,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:41,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:41,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:41,673 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 87 proven. 28 refuted. 0 times theorem prover too weak. 807 trivial. 0 not checked. [2021-05-06 08:20:41,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:41,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111235548] [2021-05-06 08:20:41,673 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:41,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122646597] [2021-05-06 08:20:41,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122646597] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:41,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:41,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:20:41,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3451293] [2021-05-06 08:20:41,673 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:20:41,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:41,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:20:41,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:20:41,674 INFO L87 Difference]: Start difference. First operand 419 states and 539 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-05-06 08:20:41,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:41,846 INFO L93 Difference]: Finished difference Result 433 states and 550 transitions. [2021-05-06 08:20:41,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:20:41,846 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 157 [2021-05-06 08:20:41,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:41,848 INFO L225 Difference]: With dead ends: 433 [2021-05-06 08:20:41,848 INFO L226 Difference]: Without dead ends: 432 [2021-05-06 08:20:41,848 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 77.5ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:20:41,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-05-06 08:20:41,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 431. [2021-05-06 08:20:41,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 242 states have (on average 1.103305785123967) internal successors, (267), 243 states have internal predecessors, (267), 141 states have call successors, (141), 48 states have call predecessors, (141), 47 states have return successors, (139), 139 states have call predecessors, (139), 139 states have call successors, (139) [2021-05-06 08:20:41,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 547 transitions. [2021-05-06 08:20:41,856 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 547 transitions. Word has length 157 [2021-05-06 08:20:41,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:41,856 INFO L480 AbstractCegarLoop]: Abstraction has 431 states and 547 transitions. [2021-05-06 08:20:41,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-05-06 08:20:41,856 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 547 transitions. [2021-05-06 08:20:41,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-05-06 08:20:41,857 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:20:41,858 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:20:42,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-06 08:20:42,074 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:20:42,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:20:42,074 INFO L82 PathProgramCache]: Analyzing trace with hash 915217378, now seen corresponding path program 7 times [2021-05-06 08:20:42,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:20:42,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985053061] [2021-05-06 08:20:42,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:20:42,083 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:20:42,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [420623329] [2021-05-06 08:20:42,083 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:42,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:20:42,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 89 conjunts are in the unsatisfiable core [2021-05-06 08:20:42,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:20:42,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,891 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-06 08:20:42,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:43,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:43,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:43,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:43,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:43,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:43,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:43,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:43,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:43,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:43,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:43,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:43,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:43,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:43,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:43,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:43,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:43,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:43,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:43,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:43,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:43,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:43,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:43,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:43,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:43,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:43,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:43,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:43,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:43,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:44,010 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2021-05-06 08:20:44,230 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-05-06 08:20:44,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:44,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:44,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:44,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:44,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:44,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:44,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:44,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:44,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:44,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:44,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:44,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:44,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:44,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:44,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:44,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:44,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:44,347 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 227 proven. 129 refuted. 0 times theorem prover too weak. 571 trivial. 0 not checked. [2021-05-06 08:20:44,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:44,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985053061] [2021-05-06 08:20:44,347 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:44,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420623329] [2021-05-06 08:20:44,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420623329] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:44,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:44,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-05-06 08:20:44,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873134648] [2021-05-06 08:20:44,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-06 08:20:44,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:44,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-06 08:20:44,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-05-06 08:20:44,350 INFO L87 Difference]: Start difference. First operand 431 states and 547 transitions. Second operand has 25 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 14 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 13 states have call predecessors, (27), 13 states have call successors, (27) [2021-05-06 08:20:44,757 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-05-06 08:20:45,702 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-05-06 08:20:45,925 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-05-06 08:20:46,205 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-05-06 08:20:46,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:20:46,391 INFO L93 Difference]: Finished difference Result 445 states and 566 transitions. [2021-05-06 08:20:46,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-06 08:20:46,392 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 14 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 13 states have call predecessors, (27), 13 states have call successors, (27) Word has length 160 [2021-05-06 08:20:46,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:20:46,392 INFO L225 Difference]: With dead ends: 445 [2021-05-06 08:20:46,392 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 08:20:46,393 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 2395.2ms TimeCoverageRelationStatistics Valid=148, Invalid=974, Unknown=0, NotChecked=0, Total=1122 [2021-05-06 08:20:46,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 08:20:46,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 08:20:46,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 08:20:46,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 08:20:46,393 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 160 [2021-05-06 08:20:46,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:20:46,393 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 08:20:46,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 14 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 13 states have call predecessors, (27), 13 states have call successors, (27) [2021-05-06 08:20:46,393 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 08:20:46,393 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 08:20:46,594 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:20:46,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:20:46 BasicIcfg [2021-05-06 08:20:46,597 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 08:20:46,598 INFO L168 Benchmark]: Toolchain (without parser) took 47033.58 ms. Allocated memory was 169.9 MB in the beginning and 354.4 MB in the end (delta: 184.5 MB). Free memory was 135.0 MB in the beginning and 265.0 MB in the end (delta: -130.0 MB). Peak memory consumption was 55.7 MB. Max. memory is 8.0 GB. [2021-05-06 08:20:46,598 INFO L168 Benchmark]: CDTParser took 0.51 ms. Allocated memory is still 169.9 MB. Free memory is still 152.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 08:20:46,598 INFO L168 Benchmark]: CACSL2BoogieTranslator took 414.75 ms. Allocated memory is still 169.9 MB. Free memory was 134.9 MB in the beginning and 153.1 MB in the end (delta: -18.2 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. [2021-05-06 08:20:46,598 INFO L168 Benchmark]: Boogie Preprocessor took 48.18 ms. Allocated memory is still 169.9 MB. Free memory was 153.1 MB in the beginning and 151.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 08:20:46,598 INFO L168 Benchmark]: RCFGBuilder took 531.59 ms. Allocated memory is still 169.9 MB. Free memory was 151.5 MB in the beginning and 134.2 MB in the end (delta: 17.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-06 08:20:46,598 INFO L168 Benchmark]: IcfgTransformer took 15.50 ms. Allocated memory is still 169.9 MB. Free memory was 134.2 MB in the beginning and 132.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 08:20:46,598 INFO L168 Benchmark]: TraceAbstraction took 46018.02 ms. Allocated memory was 169.9 MB in the beginning and 354.4 MB in the end (delta: 184.5 MB). Free memory was 132.1 MB in the beginning and 265.0 MB in the end (delta: -132.9 MB). Peak memory consumption was 53.5 MB. Max. memory is 8.0 GB. [2021-05-06 08:20:46,598 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.51 ms. Allocated memory is still 169.9 MB. Free memory is still 152.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 414.75 ms. Allocated memory is still 169.9 MB. Free memory was 134.9 MB in the beginning and 153.1 MB in the end (delta: -18.2 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 48.18 ms. Allocated memory is still 169.9 MB. Free memory was 153.1 MB in the beginning and 151.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 531.59 ms. Allocated memory is still 169.9 MB. Free memory was 151.5 MB in the beginning and 134.2 MB in the end (delta: 17.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * IcfgTransformer took 15.50 ms. Allocated memory is still 169.9 MB. Free memory was 134.2 MB in the beginning and 132.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 46018.02 ms. Allocated memory was 169.9 MB in the beginning and 354.4 MB in the end (delta: 184.5 MB). Free memory was 132.1 MB in the beginning and 265.0 MB in the end (delta: -132.9 MB). Peak memory consumption was 53.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 45954.9ms, OverallIterations: 31, TraceHistogramMax: 21, EmptinessCheckTime: 85.0ms, AutomataDifference: 20816.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1433 SDtfs, 957 SDslu, 8928 SDs, 0 SdLazy, 11227 SolverSat, 1141 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14089.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3250 GetRequests, 2776 SyntacticMatches, 16 SemanticMatches, 458 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 11090.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=431occurred in iteration=30, InterpolantAutomatonStates: 372, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 245.9ms AutomataMinimizationTime, 31 MinimizatonAttempts, 182 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 405.6ms SsaConstructionTime, 1462.0ms SatisfiabilityAnalysisTime, 14716.7ms InterpolantComputationTime, 3151 NumberOfCodeBlocks, 2791 NumberOfCodeBlocksAsserted, 74 NumberOfCheckSat, 3120 ConstructedInterpolants, 0 QuantifiedInterpolants, 20518 SizeOfPredicates, 246 NumberOfNonLiveVariables, 7933 ConjunctsInSsa, 1192 ConjunctsInUnsatCore, 31 InterpolantComputations, 2 PerfectInterpolantSequences, 10052/11280 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...